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116-476: Copper deposits are recorded as having been discovered in the area around the year 1550, but exploitation did not begin until two local households received an official permit in 1610 to establish a mine. In 1611, copper from the site was presented to officials of the shogunate; and shortly thereafter, Ashio was officially listed as a copper mine belonging to the Tokugawa shogunate . Copper, including that produced at

232-420: A dichromate solution, turning the solution from orange to green (Cr (aq)). It can also reduce ferric ions to ferrous. Sulfur dioxide can react with certain 1,3- dienes in a cheletropic reaction to form cyclic sulfones . This reaction is exploited on an industrial scale for the synthesis of sulfolane , which is an important solvent in the petrochemical industry . Sulfur dioxide can bind to metal ions as

348-399: A ligand to form metal sulfur dioxide complexes , typically where the transition metal is in oxidation state 0 or +1. Many different bonding modes (geometries) are recognized, but in most cases, the ligand is monodentate, attached to the metal through sulfur, which can be either planar and pyramidal η . As a η -SO 2 (S-bonded planar) ligand sulfur dioxide functions as a Lewis base using

464-602: A decade of protest was the 1897 Third Mine Pollution Prevention Order, which ordered the Furukawa Corporation , the mine's owner, to take action to prevent further toxins from leaking into the Watarase River. In addition, the government, headed by Ōkuma Shigenobu , put plans for reforestation of the area surrounding the Ashio Copper Mine. After the 1897 Third Mine Pollution Prevention Order,

580-522: A few drills, and the injured officials. At the Honzan Ariki mine pits, miners destroyed the underground foremen's cabins early in the morning before moving aboveground in two groups. They targeted the offices at the mine pits, and then moved to the company store and two departments at the center of the Ashio Copper Mine, where they looted the store and broke windows and doors at the departments. When Mine Director Minami Teizō arrived later that morning,

696-461: A growing threat to the stability of the shogunate. As Ōgosho ("Cloistered Shōgun "), he influenced the implementation of laws that banned the practice of Christianity. His successors followed suit, compounding upon Ieyasu's laws. The ban of Christianity is often linked with the creation of the Seclusion laws, or Sakoku , in the 1630s. The late Tokugawa shogunate ( Japanese : 幕末 Bakumatsu )

812-621: A high heat of evaporation , sulfur dioxide is a candidate material for refrigerants. Before the development of chlorofluorocarbons , sulfur dioxide was used as a refrigerant in home refrigerators . Sulfur dioxide content in naturally-released geothermal gasses is measured by the Icelandic Meteorological Office as an indicator of possible volcanic activity. In the United States, the Center for Science in

928-470: A natural satellite of Jupiter , is 90% sulfur dioxide and trace amounts are thought to also exist in the atmosphere of Jupiter . The James Webb Space Telescope has observed the presence of sulfur dioxide on the exoplanet WASP-39b , where it is formed through photochemistry in the planet's atmosphere. As an ice, it is thought to exist in abundance on the Galilean moons —as subliming ice or frost on

1044-681: A negative inotropic effect on cardiac output function, thus effectively lowering blood pressure and myocardial oxygen consumption. The vasodilating and bronchodilating effects of sulfur dioxide are mediated via ATP-dependent calcium channels and L-type ("dihydropyridine") calcium channels. Endogenous sulfur dioxide is also a potent antiinflammatory, antioxidant and cytoprotective agent. It lowers blood pressure and slows hypertensive remodeling of blood vessels, especially thickening of their intima. It also regulates lipid metabolism. Endogenous sulfur dioxide also diminishes myocardial damage, caused by isoproterenol adrenergic hyperstimulation, and strengthens

1160-462: A preservative for dried apricots, dried figs, and other dried fruits, owing to its antimicrobial properties and ability to prevent oxidation , and is called E 220 when used in this way in Europe. As a preservative, it maintains the colorful appearance of the fruit and prevents rotting . Historically, molasses was "sulfured" as a preservative and also to lighten its color. Treatment of dried fruit

1276-698: A railway, and steam engines to haul the copper. In addition to technological developments, the mine also shifted from Tokugawa-era processing methods to a process of mass extraction. Emissions from the new smelters included sulfur dioxide , which caused lung damage in people and created acid rain that poisoned land and animals; and arsenic , which caused all manner of health problems when ingested. The new processing methods caused additional problems: Mass extraction produced piles of slag, which rainwater ran through and from which it absorbed chemicals. This rainwater found its way into nearby rivers, and from there into fields of crops which were then poisoned and suffocated. By

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1392-577: A result of the Ashio mining operations in the late 19th and early 20th centuries. This was Japan's first major pollution disaster, and has also been credited by historians as leading to the birth of the Japanese environmental movement. As the Ashio Copper Mine's production boomed in the 1870s and 1880s, people living downstream from the mine, along the Watarase and Tone rivers, began to notice changes in

1508-561: A result, the tax revenues collected by the samurai landowners increasingly declined over time. A 2017 study found that peasant rebellions and desertion lowered tax rates and inhibited state growth in the Tokugawa shogunate. By the mid-18th century, both the shogun and daimyos were hampered by financial difficulties, whereas more wealth flowed to the merchant class. Peasant uprisings and samurai discontent became increasingly prevalent. Some reforms were enacted to attend to these issues such as

1624-523: A rural population flow to urban areas. By the Genroku period (1688–1704) Japan saw a period of material prosperity and the blossoming of the arts, such as the early development of ukiyo-e by Moronobu . The reign of Tokugawa Yoshimune (1716–1745) saw poor harvests and a fall in tax revenue in the early 1720s, as a result he pushed for the Kyoho reforms to repair the finances of the bakufu as he believed

1740-521: A speech questioning Enomoto's behavior, which gained him support from several notable figures. Then, in March, dissatisfied farmers marched on Tokyo twice, with the second march comprising 4,000 participants. The government was still slow to act, but it did act. After visiting the area surrounding the mine and seeing the damage for himself, Enomoto eventually created a Pollution Investigation Committee. He then resigned on December 28, 1897. The result of almost

1856-423: A winery due to the risk of cork taint , a mixture of SO 2 , water, and citric acid is commonly used to clean and sanitize equipment. Ozone (O 3 ) is now used extensively for sanitizing in wineries due to its efficacy, and because it does not affect the wine or most equipment. Sulfur dioxide is also a good reductant . In the presence of water, sulfur dioxide is able to decolorize substances. Specifically, it

1972-484: Is exothermic , and the combustion produces temperatures of 1,000–1,600 °C (1,830–2,910 °F). The significant amount of heat produced is recovered by steam generation that can subsequently be converted to electricity. The combustion of hydrogen sulfide and organosulfur compounds proceeds similarly. For example: The roasting of sulfide ores such as pyrite , sphalerite , and cinnabar (mercury sulfide) also releases SO 2 : A combination of these reactions

2088-399: Is a bent molecule with C 2v symmetry point group . A valence bond theory approach considering just s and p orbitals would describe the bonding in terms of resonance between two resonance structures. The sulfur–oxygen bond has a bond order of 1.5. There is support for this simple approach that does not invoke d orbital participation. In terms of electron-counting formalism,

2204-469: Is a colorless gas with a pungent smell that is responsible for the odor of burnt matches. It is released naturally by volcanic activity and is produced as a by-product of copper extraction and the burning of sulfur - bearing fossil fuels. Sulfur dioxide is somewhat toxic to humans, although only when inhaled in relatively large quantities for a period of several minutes or more. It was known to medieval alchemists as "volatile spirit of sulfur". SO 2

2320-401: Is a key component of the planet's global atmospheric sulfur cycle and contributes to global warming . It has been implicated as a key agent in the warming of early Mars , with estimates of concentrations in the lower atmosphere as high as 100 ppm, though it only exists in trace amounts. On both Venus and Mars, as on Earth, its primary source is thought to be volcanic. The atmosphere of Io ,

2436-402: Is a useful reducing bleach for papers and delicate materials such as clothes. This bleaching effect normally does not last very long. Oxygen in the atmosphere reoxidizes the reduced dyes, restoring the color. In municipal wastewater treatment, sulfur dioxide is used to treat chlorinated wastewater prior to release. Sulfur dioxide reduces free and combined chlorine to chloride . Sulfur dioxide

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2552-410: Is an intermediate in the production of sulfuric acid, being converted to sulfur trioxide , and then to oleum , which is made into sulfuric acid. Sulfur dioxide for this purpose is made when sulfur combines with oxygen. The method of converting sulfur dioxide to sulfuric acid is called the contact process . Several million tons are produced annually for this purpose. Sulfur dioxide is sometimes used as

2668-484: Is fairly soluble in water, and by both IR and Raman spectroscopy; the hypothetical sulfurous acid , H 2 SO 3 , is not present to any extent. However, such solutions do show spectra of the hydrogen sulfite ion, HSO 3 , by reaction with water, and it is in fact the actual reducing agent present: In the beginning of the 20th century sulfur dioxide was used in Buenos Aires as a fumigant to kill rats that carried

2784-431: Is often used as a low-temperature solvent/diluent for superacids like magic acid (FSO 3 H/SbF 5 ), allowing for highly reactive species like tert -butyl cation to be observed spectroscopically at low temperature (though tertiary carbocations do react with SO 2 above about −30 °C, and even less reactive solvents like SO 2 ClF must be used at these higher temperatures). Being easily condensed and possessing

2900-748: Is produced biologically as an intermediate in both sulfate-reducing organisms and in sulfur-oxidizing bacteria, as well. The role of sulfur dioxide in mammalian biology is not yet well understood. Sulfur dioxide blocks nerve signals from the pulmonary stretch receptors and abolishes the Hering–Breuer inflation reflex . It is considered that endogenous sulfur dioxide plays a significant physiological role in regulating cardiac and blood vessel function, and aberrant or deficient sulfur dioxide metabolism can contribute to several different cardiovascular diseases, such as arterial hypertension , atherosclerosis , pulmonary arterial hypertension , and stenocardia . It

3016-433: Is produced by the combustion of elemental sulfur . Some sulfur dioxide is also produced by roasting pyrite and other sulfide ores in air. Sulfur dioxide is the product of the burning of sulfur or of burning materials that contain sulfur: To aid combustion, liquified sulfur (140–150 °C (284–302 °F) is sprayed through an atomizing nozzle to generate fine drops of sulfur with a large surface area. The reaction

3132-516: Is responsible for the largest source of sulfur dioxide, volcanic eruptions. These events can release millions of tons of SO 2 . Sulfur dioxide can also be a byproduct in the manufacture of calcium silicate cement; CaSO 4 is heated with coke and sand in this process: Until the 1970s commercial quantities of sulfuric acid and cement were produced by this process in Whitehaven , England. Upon being mixed with shale or marl , and roasted,

3248-602: Is still an important compound in winemaking, and is measured in parts per million ( ppm ) in wine. It is present even in so-called unsulfurated wine at concentrations of up to 10 mg/L. It serves as an antibiotic and antioxidant , protecting wine from spoilage by bacteria and oxidation – a phenomenon that leads to the browning of the wine and a loss of cultivar specific flavors. Its antimicrobial action also helps minimize volatile acidity. Wines containing sulfur dioxide are typically labeled with "containing sulfites ". Sulfur dioxide exists in wine in free and bound forms, and

3364-429: Is the active form, while at higher pH more SO 2 is found in the inactive sulfite and bisulfite forms. The molecular SO 2 is active as an antimicrobial and antioxidant, and this is also the form which may be perceived as a pungent odor at high levels. Wines with total SO 2 concentrations below 10 ppm do not require "contains sulfites" on the label by US and EU laws. The upper limit of total SO 2 allowed in wine in

3480-410: Is used in the production of sulfuric acid. Sulfur dioxide dissolves in water to give " sulfurous acid ", which cannot be isolated and is instead an acidic solution of bisulfite , and possibly sulfite , ions. Sulfur dioxide is one of the few common acidic yet reducing gases. It turns moist litmus pink (being acidic), then white (due to its bleaching effect). It may be identified by bubbling it through

3596-641: The Edo shogunate ( 江戸幕府 , Edo bakufu ) , was the military government of Japan during the Edo period from 1603 to 1868. The Tokugawa shogunate was established by Tokugawa Ieyasu after victory at the Battle of Sekigahara , ending the civil wars of the Sengoku period following the collapse of the Ashikaga shogunate . Ieyasu became the shōgun , and the Tokugawa clan governed Japan from Edo Castle in

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3712-768: The Imperial Court in Kyoto to the Tokugawa family. While the Emperor officially had the prerogative of appointing the shōgun and received generous subsidies, he had virtually no say in state affairs. The shogunate issued the Laws for the Imperial and Court Officials ( kinchu narabini kuge shohatto 禁中並公家諸法度) to set out its relationship with the Imperial family and the kuge (imperial court officials), and specified that

3828-489: The Kansei reform (1787–1793) by Matsudaira Sadanobu . He bolstered the bakufu's rice stockpiles and mandated daimyos to follow suit. He cut down urban spending, allocated reserves for potential famines, and urged city-dwelling peasants to return to rural areas. By 1800, Japan included five cities with over 100,000 residents, and three among the world's twenty cities that had more than 300,000 inhabitants. Edo likely claimed

3944-663: The Yersinia pestis bacterium, which causes bubonic plague. The application was successful, and the application of this method was extended to other areas in South America. In Buenos Aires, where these apparatuses were known as Sulfurozador , but later also in Rio de Janeiro, New Orleans and San Francisco, the sulfur dioxide treatment machines were brought into the streets to enable extensive disinfection campaigns, with effective results. Sulfur dioxide or its conjugate base bisulfite

4060-528: The gundai ( 郡代 ), the daikan ( 代官 ) and the kura bugyō ( 蔵奉行 ), as well as hearing cases involving samurai. The gundai managed Tokugawa domains with incomes greater than 10,000 koku while the daikan managed areas with incomes between 5,000 and 10,000 koku. The shogun directly held lands in various parts of Japan. These were known as shihaisho (支配所); since the Meiji period, the term tenryō ( 天領 , literally "Emperor's land") has become synonymous, because

4176-528: The han and the court in Edo. During their absences from Edo, it was also required that they leave their family as hostages until their return. The hostages and the huge expenditure sankin-kōtai imposed on each han helped to ensure loyalty to the shōgun . By the 1690s, the vast majority of daimyos would be born in Edo, and most would consider it their homes. Some daimyos had little interest in their domains and needed to be begged to return "home". In return for

4292-442: The jisha , kanjō , and machi-bugyō , which respectively oversaw temples and shrines , accounting, and the cities. The jisha-bugyō had the highest status of the three. They oversaw the administration of Buddhist temples ( ji ) and Shinto shrines ( sha ), many of which held fiefs. Also, they heard lawsuits from several land holdings outside the eight Kantō provinces. The appointments normally went to daimyōs ; Ōoka Tadasuke

4408-617: The proliferation rate of endothelial smooth muscle cells in blood vessels, via lowering the MAPK activity and activating adenylyl cyclase and protein kinase A . Smooth muscle cell proliferation is one of important mechanisms of hypertensive remodeling of blood vessels and their stenosis , so it is an important pathogenetic mechanism in arterial hypertension and atherosclerosis. Endogenous sulfur dioxide in low concentrations causes endothelium-dependent vasodilation . In higher concentrations it causes endothelium-independent vasodilation and has

4524-408: The rōjū to a more distant part of the castle. Some of the most famous soba yōnin were Yanagisawa Yoshiyasu and Tanuma Okitsugu . The ōmetsuke and metsuke were officials who reported to the rōjū and wakadoshiyori . The five ōmetsuke were in charge of monitoring the affairs of the daimyōs , kuge and imperial court. They were in charge of discovering any threat of rebellion. Early in

4640-427: The sankin-kōtai system ensured that daimyōs or their family were always in Edo, observed by the shogun. The shogunate had the power to discard, annex, and transform domains, although they were rarely and carefully exercised after the early years of the shogunate, to prevent daimyōs from banding together. The sankin-kōtai system of alternative residence required each daimyō to reside in alternate years between

4756-410: The shōgun . Under the wakadoshiyori were the metsuke . Some shōguns appointed a soba yōnin . This person acted as a liaison between the shōgun and the rōjū . The soba yōnin increased in importance during the time of the fifth shōgun Tokugawa Tsunayoshi , when a wakadoshiyori, Inaba Masayasu , assassinated Hotta Masatoshi , the tairō . Fearing for his personal safety, Tsunayoshi moved

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4872-419: The treaty ports of Nagasaki and Kanagawa (Yokohama). Source: Over the course of the Edo period, influential relatives of the shogun included: Sulfur dioxide Selenium dioxide Tellurium dioxide Polonium dioxide Sulfur dioxide ( IUPAC -recommended spelling) or sulphur dioxide (traditional Commonwealth English ) is the chemical compound with the formula S O 2 . It

4988-644: The ōmetsuke evolved into one of passing orders from the shogunate to the daimyōs , and of administering to ceremonies within Edo Castle. They also took on additional responsibilities such as supervising religious affairs and controlling firearms. The metsuke , reporting to the wakadoshiyori , oversaw the affairs of the vassals of the shōgun . They were the police force for the thousands of hatamoto and gokenin who were concentrated in Edo. Individual han had their own metsuke who similarly policed their samurai. The san- bugyō (三奉行 "three administrators") were

5104-467: The "restoration" ( 王政復古 , Ōsei fukko ) of imperial rule. Some loyal retainers of the shogun continued to fight during the Boshin war that followed but were eventually defeated in the notable Battle of Toba–Fushimi . The bakuhan system ( bakuhan taisei 幕藩体制 ) was the feudal political system in the Edo period of Japan. Baku is an abbreviation of bakufu , meaning " military government "—that is,

5220-488: The Ashio mine, played an important role in the solidification of Tokugawa rule in the early part of the 1600s and later became Japan's chief metal export after 1685. Copper from the mine was used in the minting of Kan'ei Tsūhō copper coins and in the roofing for the Shoganate's temple of Zōjō-ji in Edo . At its peak, the mine produced about 1,200 tons annually; however, Japan's mining industry began to decline during

5336-407: The Edo period, daimyōs such as Yagyū Munefuyu held the office. Soon, however, it fell to hatamoto with rankings of 5,000 koku or more. To give them authority in their dealings with daimyōs , they were often ranked at 10,000 koku and given the title of kami (an ancient title, typically signifying the governor of a province ) such as Bizen-no-kami . As time progressed, the function of

5452-417: The Edo period. They were ranked by size, which was measured as the number of koku of rice that the domain produced each year. One koku was the amount of rice necessary to feed one adult male for one year. The minimum number for a daimyō was ten thousand koku ; the largest, apart from the shōgun , was more than a million koku . The main policies of the shogunate on the daimyos included: Although

5568-495: The Emperor should dedicate to scholarship and poetry. The shogunate also appointed a liaison, the Kyoto Shoshidai ( Shogun's Representative in Kyoto ), to deal with the Emperor, court and nobility. Towards the end of the shogunate, however, after centuries of the Emperor having very little say in state affairs and being secluded in his Kyoto palace , and in the wake of the reigning shōgun , Tokugawa Iemochi , marrying

5684-657: The Meiji period, arsenic trioxide became a major secondary product of the mine, and large amounts of sulfuric acid was also used for minerals extraction. In the aftermath of the Ashio Copper Mine Incident and the Mining Pollution Prevention Ordinance of 1897, the mine owners replaced their previous expansion-focused policy with a policy of stabilization and retrenchment. Over three days in February 1907, miners at

5800-586: The Sunpu government's cabinet was consisted of trusted vassals of Ieyasu which was not included in Hidetada's cabinet. including William Adams (samurai) and Jan Joosten van Lodensteijn , which Ieyasu entrusted with foreign affairs and diplomacy. The earliest structure of Edo Shogunate organization has Buke Shitsuyaku as the highest rank. the earliest members of this office were Ii Naomasa , Sakakibara Yasumasa , and Honda Tadakatsu . The personal vassals of

5916-459: The Tokugawa clan in the Battle of Sekigahara had their estate reduced substantially. They were often placed in mountainous or far away areas, or placed between most trusted daimyos. Early in the Edo period, the shogunate viewed the tozama as the least likely to be loyal; over time, strategic marriages and the entrenchment of the system made the tozama less likely to rebel. In the end, however, it

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6032-414: The Tokugawa shoguns were classified into two groups: By the early 18th century, out of around 22,000 personal vassals, most would have received stipends rather than domains. The rōjū ( 老中 ) were normally the most senior members of the shogunate. Normally, four or five men held the office, and one was on duty for a month at a time on a rotating basis. They supervised the ōmetsuke (who checked on

6148-452: The Tsūdō office and threw rocks at the windows through the evening, at which point the rioting ended for the day. Meanwhile, the local police asked the prefect-level police for help with the riot and ordered the miners' bosses to control their men. The police resorted to negotiating with the miners at a distance, and the bosses only watched the goings-on out of fear they would be attacked too. Early

6264-504: The US is 350 ppm; in the EU it is 160 ppm for red wines and 210 ppm for white and rosé wines. In low concentrations, SO 2 is mostly undetectable in wine, but at free SO 2 concentrations over 50 ppm, SO 2 becomes evident in the smell and taste of wine. SO 2 is also a very important compound in winery sanitation. Wineries and equipment must be kept clean, and because bleach cannot be used in

6380-510: The action of aqueous base on sulfur dioxide: Sulfur dioxide is a mild but useful reducing agent . It is oxidized by halogens to give the sulfuryl halides, such as sulfuryl chloride : Sulfur dioxide is the oxidising agent in the Claus process , which is conducted on a large scale in oil refineries . Here, sulfur dioxide is reduced by hydrogen sulfide to give elemental sulfur: The sequential oxidation of sulfur dioxide followed by its hydration

6496-444: The area around them. Colonies of silkworms were eating mulberry leaves from near the mine and dying, and farmers had noticed changes in the color of the Watarase River as early as the 1870s—just as the copper mine was expanding. The river's fish population was plummeting, which put around 3000 fishermen in the area out of work. In addition, shoring up mine shafts, fueling steam engines and copper smelters, and building other facilities for

6612-497: The beginning of 1901, Tanaka questioned the government's response to the incident in the Diet. Then, in a speech in March 1901, he called the government treasonous over its treatment of the mine incident. After resigning from the Diet, he attempted to deliver a letter of appeal directly to Emperor Meiji himself. While Tanaka was prevented from handing over the letter, its contents were published by national newspapers, helping to publicise

6728-450: The blasting resulted in even more toxic chemicals entering the environment. In spite of promised plans to minimize pollution at the mine, environmental conditions in the vicinity of the Ashio Copper Mine continued to deteriorate. After additional severe flooding, local farmers petitioned minister of agriculture and commerce Enomoto Takeaki , as well as Japan's finance minister for relief, but were dismissed. In February 1897, Tanaka delivered

6844-606: The capital as hostages. In 1616, there was a failed attempt of the invasion of Taiwan by a Shogunate subject named Murayama Tōan . A long period of peace occurred between the Siege of Osaka in 1615 and the Keian Uprising in 1651. This period saw the bakufu prioritise civil administration, while civil society witnessed a surge in trade and industrial activities. Trade under the reign of Ieyasu saw much new wealth created by mining and goods manufacturing, which resulted in

6960-403: The case of many women, trouble producing milk. At the same time as the environmental damage was occurring in the Watarase River valley, the Ashio Copper Mine was expanding and modernizing. The expansion in the 1880s and 1890s had brought electrification, which had brought telephones, all matter of mechanized technology, several kinds of separators and smelters—including a massive Bessemer smelter,

7076-484: The centralization, peace among the daimyos was maintained; unlike in the Sengoku period , daimyos no longer worried about conflicts with one another. In addition, hereditary succession was guaranteed as internal usurpations within domains were not recognized by the shogunate. The Tokugawa clan further ensured loyalty by maintaining a dogmatic insistence on loyalty to the shōgun . Daimyos were classified into three main categories: The tozama daimyos who fought against

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7192-421: The combinations are referred to as total SO 2 . Binding, for instance to the carbonyl group of acetaldehyde , varies with the wine in question. The free form exists in equilibrium between molecular SO 2 (as a dissolved gas) and bisulfite ion, which is in turn in equilibrium with sulfite ion. These equilibria depend on the pH of the wine. Lower pH shifts the equilibrium towards molecular (gaseous) SO 2 , which

7308-533: The country was still nominally organized as imperial provinces . Under the Tokugawa shogunate, Japan experienced rapid economic growth and urbanization, which led to the rise of the merchant class and Ukiyo culture. The Tokugawa shogunate declined during the Bakumatsu period from 1853 and was overthrown by supporters of the Imperial Court in the Meiji Restoration in 1868. The Empire of Japan

7424-408: The country, particularly smaller regions, daimyō, and samurai were more or less identical, since daimyō might be trained as samurai, and samurai might act as local rulers. The largely inflexible nature of this social stratification system unleashed disruptive forces over time. Taxes on the peasantry were set at fixed amounts that did not account for inflation or other changes in monetary value. As

7540-531: The daimyos), machi - bugyō (commissioners of administrative and judicial functions in major cities, especially Edo), ongoku bugyō  [ ja ] (遠国奉行, the commissioners of other major cities and shogunate domains) and other officials, oversaw relations with the Imperial Court in Kyoto , kuge (members of the nobility), daimyō, Buddhist temples and Shinto shrines , and attended to matters like divisions of fiefs . Other bugyō (commissioners) in charge of finances, monasteries and shrines also reported to

7656-478: The destruction of the villages of Kawabe, Toshima, and Yanaka. Although the villages fought the proposition for two years, it was put into place in 1904. The government began buying out farmers in Yanaka in early 1906 and the destruction process began in 1907 and was completed in a few weeks. The basin that was created became a pond, Watarase Yusui-chi ( 渡良瀬遊水地 ), which became a UNESCO Ramsar site in 2012. In 1911,

7772-478: The early 1890s, farmers and local politicians in the area surrounding the Ashio Copper Mine were becoming increasingly concerned with the pollution resulting from the mine. One of these local politicians was Shōzō Tanaka , who had been elected to the National Diet in 1890. In 1891, after the disastrous 1890 flood, he gave a speech on the floor of the Diet calling on the government to close the mine because of

7888-417: The eastern city of Edo ( Tokyo ) along with the daimyō lords of the samurai class. The Tokugawa shogunate organized Japanese society under the strict Tokugawa class system and banned most foreigners under the isolationist policies of Sakoku to promote political stability. The Tokugawa shoguns governed Japan in a feudal system, with each daimyō administering a han (feudal domain), although

8004-464: The expanding mine required wood, which in turn led to large-scale deforestation in the area, and meant that the towns downstream of the mines lost their flood protection. The first major flood came in 1890, and brought with it an unprecedented set of consequences. Instead of bringing a layer of silt that would help the next harvest, the 1890 flood brought silt contaminated by slag from the Ashio Copper Mine. This contaminated floodwater and silt destroyed all

8120-436: The finding of new veins of copper to modernize and expand the mine with modern technology and foreign mining engineering expertise. By the 1880s production had increased dramatically, reaching 2286 tons by 1884, which accounted for 26 percent of Japan's copper production . A year later, the mine was producing over nine million tons, and by the end of the century, it accounted for 40 percent of Japan's copper production . During

8236-470: The government passed the Factory Law, Japan's first law to address industrial pollution. The 1907 Ashio Riot occurred February 4–6, 1907, involved pit miners who had been demanding higher wages, and targeted mostly infrastructure and low-level mining officials. The riot resulted in higher wages and also triggered other strikes and riots in similar industries. The department with direct supervision over

8352-462: The latter part of the Edo period and the Ashio mine was almost closed at the time of the Meiji restoration . It became privately owned in 1871 following the industrialization initiated by the Meiji restoration , by which time production had dropped to less than 150 tons per year. In 1877, however, it became the property of Furukawa Ichibei , who then used the financial backing of Shibusawa Eiichi and

8468-493: The local police began conducting searches through the miners' shacks in Hozan, which had been the center of the riots. From February 7 through February 9, authorities arrested 628 individuals, 182 of whom were prosecuted. On the afternoon of February 10, the pit managers at Hozan and Tsūdō informed the miners' representatives that the company would be firing all miners at both pits and requiring them to submit requests for rehiring by

8584-420: The lone pair on S. SO 2 functions as a Lewis acids in its η -SO 2 (S-bonded pyramidal) bonding mode with metals and in its 1:1 adducts with Lewis bases such as dimethylacetamide and trimethyl amine . When bonding to Lewis bases the acid parameters of SO 2 are E A = 0.51 and E A = 1.56. The overarching, dominant use of sulfur dioxide is in the production of sulfuric acid . Sulfur dioxide

8700-583: The main vector of trade exchanges, followed by the addition of Dutch, English, and sometimes Spanish ships. From 1603 onward, Japan started to participate actively in foreign trade. In 1615, an embassy and trade mission under Hasekura Tsunenaga was sent across the Pacific to Nueva España (New Spain) on the Japanese-built galleon San Juan Bautista . Until 1635, the Shogun issued numerous permits for

8816-407: The military aristocracy was losing its power against the rich merchants and landowners. Society in the Tokugawa period , unlike in previous shogunates, was supposedly based on the strict class hierarchy originally established by Toyotomi Hideyoshi . The daimyō (lords) were at the top, followed by the warrior-caste of samurai, with the farmers, artisans, and traders ranking below. In some parts of

8932-443: The mine itself early on February 4, when a group of miners destroyed the foreman's cabin for sections 3 and 4 in the Tsūdō mine pits. From there, more miners joined in and destroyed infrastructure in sections 1 and 2. The miners then began to leave the mine pits in groups and assembled in front of cabin at the entrance. Other miners who were still underground began to come aboveground later in the afternoon, when they gathered in front of

9048-432: The mine rioted over low wages and poor working conditions. Damage from the riot totaled over 283,000 yen. The Ashio mine's Excavation Department was closed in 1973, after centuries of mining and the introduction of foreign copper ore into the Japanese market. By this time, the total length of its tunnels and shaft had reached 1234 kilometers. Smelting business continued at the mine using imported ore until 1989. Afterwards,

9164-403: The miners attacked him. He managed to escape and hide while rioting miners attacked his house, but was attacked again when he tried to flee. He was then taken to the hospital and the miners left. At the same time, miners began to target company officials. The riot also spread to include bystanders who were more interested in the looting than the officials. By the late afternoon, the fuel warehouse

9280-482: The most powerful han , the hereditary fief of the House of Tokugawa, which also included many gold and silver mines. Towards the end of the shogunate, the Tokugawa clan held around 7 million koku of land (天領 tenryō), including 2.6–2.7 million koku held by direct vassals, out of 30 million in the country. The other 23 million koku were held by other daimyos. The number of han (roughly 270) fluctuated throughout

9396-421: The myocardial antioxidant defense reserve. Sulfur dioxide is a versatile inert solvent widely used for dissolving highly oxidizing salts. It is also used occasionally as a source of the sulfonyl group in organic synthesis . Treatment of aryl diazonium salts with sulfur dioxide and cuprous chloride yields the corresponding aryl sulfonyl chloride, for example: As a result of its very low Lewis basicity , it

9512-498: The next day, miners attacked the cabins at the Sunokobashi mine pits, threatened the staff there, and cut telephone lines. Meanwhile, a large group of miners also gathered at the Honzan Ariki mine pits, where the electric trucks in the mine were stopped and some officials in one of the underground section cabins were injured. The extent of the damage from the first two days of the riot included several cabins and barns, eight trucks,

9628-450: The next day. After debate, the majority of the miners accepted the company's demand and submitted the requests. On the afternoon of February 12, the company announced who they were and were not rehiring. The majority of the miners were rehired. In the days after the mine resumed operations on February 13, miners at Kodaki, the only pits where rioting did not occur, became increasingly uneasy. They wanted to know why they were being affected by

9744-406: The office, and alternated by month. Three Edo machi bugyō have become famous through jidaigeki (period films): Ōoka Tadasuke and Tōyama Kagemoto (Kinshirō) as heroes, and Torii Yōzō ( ja:鳥居耀蔵 ) as a villain. The san-bugyō together sat on a council called the hyōjōsho (評定所). In this capacity, they were responsible for administering the tenryō (the shogun's estates), supervising

9860-456: The offices close to the shōgun , such as soba yōnin  [ ja ] (側用人), Kyoto Shoshidai , and Osaka jōdai . Irregularly, the shōguns appointed a rōjū to the position of tairō (great elder). The office was limited to members of the Ii , Sakai , Doi , and Hotta clans , but Yanagisawa Yoshiyasu was given the status of tairō as well. Among the most famous was Ii Naosuke , who

9976-563: The pit miners was the Pits Department. The Pits Department was divided into four sections, three for the pits at Honzan, Tsūdō, and Kodaki, and one for a survey office responsible for gathering statistics on the other three sections. Each mine pit was divided into three sections: extraction, dressing, and general affairs, each with its own supervisor. Within the pits themselves, they were divided into 7 or 8 districts, with one guardpost for every one or two districts. The riot began within

10092-535: The plight of residents, which prompted the government to act. However the problem did not immediately go away, and protests continued for some years. In 1902, another major flood occurred; but because of the Order, the floodwaters spread much less pollution than they had previously. In December of the same year, the creation of a basin to prevent further flood damage was discussed by the Japanese government's Pollution Prevention Committee. The location of this basin involved

10208-434: The pollution. The government did not respond. In 1892, He challenged the government again, and the government responded that there were plans in place at the mine to minimize further pollution and declared the issue to be closed. In the meantime, the engineers at the mine responded to local concerns by using dynamite to blast the piles of slag that were the byproducts of the mine's mass extraction. Regardless of their intentions,

10324-532: The pro-imperialist Ishin Shishi ( nationalist patriots ) and the shogunate forces; aside from the dominant two groups, other factions attempted to use the chaos of the Bakumatsu era to seize personal power. An alliance of daimyos and the emperor, succeeded in overthrowing the shogunate, which came to an official end in 1868 with the resignation of the 15th Tokugawa shogun , Tokugawa Yoshinobu , leading to

10440-403: The response from the company caused miners at Ashio to fear that the order was threatening their jobs. Within four years of the passage of the 1897 order, Tanaka was complaining about the order as well. Having observed that the environmental damage in the area surrounding the mine had continued to increase in spite of the order, he continued to call for the mine to be closed. Several times through

10556-413: The riot's consequences if they had not participated. On February 26 the new mine director, Kondō Rikusaburō, informed the miners at Kodaki that they would be receiving bonuses for their non-involvement in the riot. On February 27 and 28, Kondō Rikusaburō visited the Hozan and Tsūdō mine pits to inform the miners that wage increases were coming and bonuses would be paid to the miners who were not involved in

10672-919: The riot. The wage increases were officially announced on March 1 and involved an average raise of 19.4 percent and improved financial provisions for absences related to injury or illness. The riot at the Ashio Copper Mine triggered a series of riots and strikes at other mines, including at the Horonai mine in May 1907, the Besshi mine in June 1907, and at others through July. [REDACTED] Media related to Ashio copper mine at Wikimedia Commons Tokugawa shogunate The Tokugawa shogunate ( / ˌ t ɒ k uː ˈ ɡ ɑː w ə / TOK -oo- GAH -wə ; Japanese : 徳川幕府 , romanized :  Tokugawa bakufu , IPA: [tokɯgawa, tokɯŋawa baꜜkɯ̥ɸɯ] ), also known as

10788-491: The rōjū. The roju conferred on especially important matters. In the administrative reforms of 1867 ( Keiō Reforms ), the office was eliminated in favor of a bureaucratic system with ministers for the interior, finance, foreign relations, army, and navy. In principle, the requirements for appointment to the office of rōjū were to be a fudai daimyō and to have a fief assessed at 50 000 koku or more. However, there were exceptions to both criteria. Many appointees came from

10904-566: The shogun issued certain laws, such as the buke shohatto on the daimyōs and the rest of the samurai class, each han administered its autonomous system of laws and taxation . The shōgun did not interfere in a han 's governance unless major incompetence (such as large rebellions) was shown, nor were central taxes issued. Instead, each han provided feudal duties, such as maintaining roads and official courier stations, building canals and harbors, providing troops, and relieving famines. Daimyōs were strategically placed to check each other, and

11020-647: The shogun's lands were returned to the emperor. In addition to the territory that Ieyasu held prior to the Battle of Sekigahara, this included lands he gained in that battle and lands gained as a result of the Summer and Winter Sieges of Osaka . Major cities as Nagasaki and Osaka, and mines , including the Sado gold mine , also fell into this category. The gaikoku bugyō were administrators appointed between 1858 and 1868. They were charged with overseeing trade and diplomatic relations with foreign countries, and were based in

11136-468: The shogunate in Edo and the daimyōs with domains throughout Japan. The shōgun and lords were all daimyōs : feudal lords with their own bureaucracies, policies, and territories. Provinces had a degree of sovereignty and were allowed an independent administration of the han in exchange for loyalty to the shōgun , who was responsible for foreign relations, national security, coinage, weights, measures, and transportation. The shōgun also administered

11252-576: The shogunate, yielding a huge profit. Foreign trade was also permitted to the Satsuma and the Tsushima domains . Rice was the main trading product of Japan during this time. Isolationism was the foreign policy of Japan and trade was strictly controlled. Merchants were outsiders to the social hierarchy of Japan and were thought to be greedy. The visits of the Nanban ships from Portugal were at first

11368-467: The shogunate. The han were the domains headed by daimyō . Beginning from Ieyasu's appointment as shogun in 1603, but especially after the Tokugawa victory in Osaka in 1615, various policies were implemented to assert the shogunate's control, which severely curtailed the daimyos' independence. The number of daimyos varied but stabilized at around 270. The bakuhan system split feudal power between

11484-496: The sister of Emperor Kōmei (r. 1846–1867), in 1862, the Imperial Court in Kyoto began to enjoy increased political influence. The Emperor would occasionally be consulted on various policies and the shogun even made a visit to Kyoto to visit the Emperor. Government administration would be formally returned from the shogun to the Emperor during the Meiji Restoration in 1868. Foreign affairs and trade were monopolized by

11600-490: The site was used for recycling industrial waste . In 1980, the "Ashio Copper Mine Sightseeing" (a tourist attraction to convey the history the copper mine) and also the Furukawa Ashio History Museum were opened. In 2008, the mine received protection as a National Historic Site . The Ashio copper mine incident  [ ja ] is the name given to the environmental disaster that occurred as

11716-677: The so-called " red seal ships " destined for the Asian trade. After 1635 and the introduction of seclusion laws ( sakoku ), inbound ships were only allowed from China , Korea , and the Netherlands . The primary source of the shogunate's income was the tax (around 40%) levied on harvests in the Tokugawa clan's personal domains (tenryō). No taxes were levied on domains of daimyos, who instead provided military duty, public works and corvee . The shogunate obtained loans from merchants, which were sometimes seen as forced donations, although commerce

11832-510: The sulfate liberated sulfur dioxide gas, used in sulfuric acid production, the reaction also produced calcium silicate, a precursor in cement production. On a laboratory scale, the action of hot concentrated sulfuric acid on copper turnings produces sulfur dioxide. Tin also reacts with concentrated sulfuric acid but it produces tin(II) sulfate which can later be pyrolyzed at 360 °C into tin dioxide and dry sulfur dioxide. The reverse reaction occurs upon acidification: Sulfites results by

11948-471: The sulfur atom has an oxidation state of +4 and a formal charge of +1. Sulfur dioxide is found on Earth and exists in very small concentrations in the atmosphere at about 15 ppb . On other planets, sulfur dioxide can be found in various concentrations, the most significant being the atmosphere of Venus , where it is the third-most abundant atmospheric gas at 150 ppm. There, it reacts with water to form clouds of Sulfurous acid (SO2 + H2O ⇌ HSO−3+ H+), and

12064-558: The title of the world's most populous city, housing over one million people. Followers of Catholic christians first began appearing in Japan during the 16th century. Oda Nobunaga embraced Christianity and the Western technology that was imported with it, such as the musket. He also saw it as a tool he could use to suppress Buddhist forces. Though Christianity was allowed to grow until the 1610s, Tokugawa Ieyasu soon began to see it as

12180-565: The trailing hemisphere of Io , and in the crust and mantle of Europa , Ganymede , and Callisto , possibly also in liquid form and readily reacting with water. Sulfur dioxide is primarily produced for sulfuric acid manufacture (see contact process , but other processes predated that at least since 16th century ). In the United States in 1979, 23.6 million metric tons (26 million U.S. short tons) of sulfur dioxide were used in this way, compared with 150,000 metric tons (165,347 U.S. short tons) used for other purposes. Most sulfur dioxide

12296-438: The vegetation it touched, rendered fields sterile, and caused workers in those fields to develop sores on their hands and feet. In 1896, a larger flood followed, causing still further environmental damage. Residents of the surrounding area also suffered multiple health issues, including sores where they came into contact with contaminated water or soil, chronic arsenic exposure, higher premature death rates, lower birth rates, and in

12412-494: Was an exception, though he later became a daimyō . The kanjō-bugyō were next in status. The four holders of this office reported to the rōjū . They were responsible for the finances of the shogunate. The machi-bugyō were the chief city administrators of Edo and other cities. Their roles included mayor, chief of the police (and, later, also of the fire department), and judge in criminal and civil matters not involving samurai. Two (briefly, three) men, normally hatamoto, held

12528-484: Was assassinated in 1860 outside the Sakuradamon Gate of Edo Castle ( Sakuradamon incident ). Three to five men titled the wakadoshiyori (若年寄) were next in status below the rōjū. An outgrowth of the early six-man rokuninshū (六人衆, 1633–1649), the office took its name and final form in 1662. Their primary responsibility was management of the affairs of the hatamoto and gokenin , the direct vassals of

12644-408: Was committed to retaining the daimyos and the han (domains) as components under his new shogunate. Daimyos who sided with Ieyasu were rewarded, and some of Ieyasu's former vassals were made daimyos and were located strategically throughout the country. The sankin-kotai policy, in an effort to constrain rebellions by the daimyos, mandated the housing of wives and children of the daimyos in

12760-768: Was established under the Meiji government , and Tokugawa loyalists continued to fight in the Boshin War until the defeat of the Republic of Ezo at the Battle of Hakodate in June 1869. Following the Sengoku period ("Warring States period"), the central government had been largely re-established by Oda Nobunaga during the Azuchi–Momoyama period . After the Battle of Sekigahara in 1600, central authority fell to Tokugawa Ieyasu. While many daimyos who fought against him were extinguished or had their holdings reduced, Ieyasu

12876-538: Was often not taxed. Special levies were also imposed for infrastructure-building. During the earliest years of the Tokugawa shogunate institution, when Tokugawa Hidetada coronated as the second shogun and Ieyasu retired, they formed a dual governments, where Hidetada controlled the official court with the government central located in Edo city, Ieyasu, who now became the Ōgosho (retired shogun), also control his own informal shadow government which called "Sunpu government" with its center at Sunpu Castle . The membership of

12992-433: Was set on fire. Meanwhile, the local and prefecture-level police were unable to come up with a plan to respond to the riot, more police had been ordered to the area, and the prefecture's governor had requested military assistance in responding to the riot. The troops left for Ashio late on the 6th, and arrived in the afternoon the next day. Three companies of troops arrived at Ashio after the riot had ended. Once they arrived,

13108-572: Was shown that in children with pulmonary arterial hypertension due to congenital heart diseases the level of homocysteine is higher and the level of endogenous sulfur dioxide is lower than in normal control children. Moreover, these biochemical parameters strongly correlated to the severity of pulmonary arterial hypertension. Authors considered homocysteine to be one of useful biochemical markers of disease severity and sulfur dioxide metabolism to be one of potential therapeutic targets in those patients. Endogenous sulfur dioxide also has been shown to lower

13224-468: Was still the great tozama of Satsuma , Chōshū and Tosa , and to a lesser extent Saga , that brought down the shogunate. These four states are called the Four Western Clans, or Satchotohi for short. Regardless of the political title of the Emperor, the shōguns of the Tokugawa family controlled Japan. The shogunate secured a nominal grant of administration ( 体制 , taisei ) by

13340-481: Was the period between 1853 and 1867, during which Japan ended its isolationist foreign policy called sakoku and modernized from a feudal shogunate to the Meiji government . The 1850s saw growing resentment by the tozama daimyōs and anti-Western sentiment following the arrival of a U.S. Navy fleet under the command of Matthew C. Perry (which led to the forced opening of Japan). The major ideological and political factions during this period were divided into

13456-467: Was usually done outdoors, by igniting sublimed sulfur and burning in an enclosed space with the fruits. Fruits may be sulfured by dipping them into an either sodium bisulfite , sodium sulfite or sodium metabisulfite . Sulfur dioxide was first used in winemaking by the Romans, when they discovered that burning sulfur candles inside empty wine vessels keeps them fresh and free from vinegar smell. It

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