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52-604: The Kanmon Straits ( 関門海峡 , Kanmon-kaikyō ) or the Straits of Shimonoseki is the stretch of water separating Honshu and Kyushu , two of Japan's four main islands. On the Honshu side of the strait is Shimonoseki ( 下関 , which contributed "Kan" ( 関 ) to the name of the strait) and on the Kyushu side is Kitakyushu , whose former city and present ward, Moji ( 門司 ), gave the strait its "mon" ( 門 ). The straits silt up at

104-685: A Csa climate well inland to ensure hot summers and cold winters. They are generally found in the highly elevated areas of south-eastern Turkey ( Hakkâri ), north-western Iran, northern Iraq, parts of Central Asia , parts of the High Atlas mountain range in central Morocco and very small parts of the Intermountain West in the United States. This climate zone does not exist at all in the Southern Hemisphere, where

156-516: A marked reduction in wintry precipitation, which increases the chances of a wintertime drought ( w ). Snowfall occurs in all areas with a humid continental climate and in many such places is more common than rain during the height of winter. In places with sufficient wintertime precipitation, the snow cover is often deep. Most summer rainfall occurs during thunderstorms , and in North America and Asia an occasional tropical cyclone (or

208-544: A population of 104 million as of 2017 , constituting 81.3% of the entire population of Japan, and mostly concentrated in the coastal areas and plains. Approximately 30% of the total population resides in the Greater Tokyo Area on the Kantō Plain . As the historical center of Japanese cultural and political power, the island includes several past Japanese capitals, including Kyōto , Nara , and Kamakura . Much of

260-661: A quarter of all paddy fields in Japan. Chiba Prefecture is famous for its peanuts, also being the largest producer in Japan. Rare species of the lichen genus Menegazzia are found only in Honshu. Most of Japan's tea and silk is from Honshu. Japan's three largest industrial regions are all located on Honshu: the Keihin region , the Hanshin Industrial Region , and the Chūkyō Industrial Area . Honshu

312-739: A subarctic climate. In the Southern Hemisphere , it exists in well-defined areas only in the Southern Alps of New Zealand , in the Snowy Mountains of Australia in Kiandra, New South Wales and the Andes Mountains of Argentina and Chile . Since climate regimes tend to be dominated by vegetation of one region with relatively homogenous ecology, those that project climate change remap their results in

364-526: A thermal profile, but because of semi-arid precipitation portions of it are grouped into the BSk category. In Europe , it is found in much of Central Europe : Germany (in the east and southeast part of the country), Austria (generally below 700 m (2,297 ft)), Poland , Czech Republic , Slovakia , Hungary (generally above 100 m (328 ft)), Croatia (mostly Slavonia region), in much of Eastern Europe : Ukraine (the whole country except

416-461: Is a number of Kanmon Tunnels which carry the Sanyō Shinkansen , trains, cars, and even one for pedestrians at the narrowest point. The first railway tunnel was opened on November 15, 1942. The highway tunnel was opened on March 9, 1958. The Kanmonkyo Bridge (see photo) was opened to vehicles on November 14, 1973. The Shinkansen tunnel was opened on March 10, 1975. The Kanmon straits is also

468-521: Is found in northern Kazakhstan , southern Siberia , parts of Mongolia , northern China , and highland elevations in the Koreas . Like its hot-summer counterpart, these climates are typically dry in the winter and bitterly cold due to the Siberian High (often with winter temperatures comparable to their nearby subarctic climates ), while summers are warm and long enough to avoid classification as

520-611: Is held in August every year. The Voyager pleasure boat departs from Moji-kō and cruises the straits. Helicopter joyrides are available from Kaikyo Dramaship in Moji-kō. In October 2005, one of the world's largest airships currently flying (a Zeppelin NT imported from Germany) also passed through Moji on an all-Japan tour. This airship was purchased by Nippon Airship Corporation in June 2004 and

572-472: Is home to a large portion of Japan's minimal mineral reserves, including small oil and coal deposits. Several coal deposits are located in the northern part of the island, concentrated in Fukushima Prefecture and Niigata Prefecture , though Honshu's coal production is negligible in comparison to Hokkaido and Kyushu . Most of Japan's oil reserves are also located in northern Honshu, along

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624-467: Is less extreme than the most inland hyper-continental variety. Using the Köppen climate classification , a climate is classified as humid continental when the temperature of the coldest month is below 0 °C [32.0 °F] or −3 °C [26.6 °F] and there must be at least four months whose mean temperatures are at or above 10 °C (50 °F). These temperatures were not arbitrary. In Europe,

676-565: Is less seasonally uniform in the west. The western states of the western United States (namely Montana , Wyoming , parts of southern Idaho , most of Lincoln County in Eastern Washington , parts of Colorado , parts of Utah , isolated parts of northern New Mexico , western Nebraska , and parts of western North and South Dakota ) have thermal regimes which fit the Dfa climate type, but are quite dry, and are generally grouped with

728-724: Is noted during the autumn of deciduous forests. In the poleward direction, these climates transition into subarctic climates featuring short summers (and usually very cold winters) allowing only conifer trees. Moving equatorword, the hot-summer continental climates grade into humid subtropical climates (chiefly in North America and Asia) while the warm-summer continental climates grade into oceanic climates (chiefly in Europe), both of which have milder winters where average temperatures stay above 0°C (or -3°C). Some continental climates with lower precipitation (chiefly in Central Asia and

780-513: Is roughly 1,300 km (810 mi) long and ranges from 50 to 230 km (31 to 143 mi) wide, and its total area is 227,960 km (88,020 sq mi), making it slightly larger than the island of Great Britain . Its land area has been increasing with land reclamation and coastal uplift in the north due to plate tectonics with a convergent boundary . Honshu has 10,084 kilometres (6,266 mi) of coastline. Mountainous and volcanic, Honshu experiences frequent earthquakes (such as

832-412: Is seismically active, and is home to 40 active volcanoes. In 2011, an earthquake of magnitude 9.0–9.1 occurred off the coast of Honshu, generating tsunami waves up to 40.5 meters (133 ft) high and killing 19,747. It was the most powerful earthquake ever recorded in Japan , and the fourth most powerful earthquake in the world since modern record-keeping began in 1900. The tsunami subsequently led to

884-701: Is to be found in northern China including Manchuria and parts of North China , south-east Russia , and over much of the Korean Peninsula ; it has the Köppen classification Dwa . Much of central Asia , northwestern China , and southern Mongolia has a thermal regime similar to that of the Dfa climate type, but these regions receive so little precipitation that they are more often classified as steppes ( BSk ) or deserts ( BWk ). Dsa climates are rare; they are generally restricted to elevated areas adjacent to mid-latitude Mediterranean climate regions with

936-698: The Black Sea coast), Belarus , Russia (mostly central part of European Russia ), south and central parts of the Nordic countries not bathed by the Atlantic Ocean or North Sea : Sweden (historical regions of Svealand and Götaland ), Denmark , Finland (south end, including the three largest cities ), Norway (most populated area), all Baltic States : Estonia , Latvia , Lithuania and also in parts of: Romania (generally above 100 m (328 ft)), Bosnia and Herzegovina , Turkey and in

988-482: The Cairngorm Mountains of Scotland , (generally above 100 m (328 ft)). It has little warming or precipitation effects from the northern Atlantic. The cool summer subtype is marked by mild summers, long cold winters and less precipitation than the hot summer subtype; however, short periods of extreme heat are not uncommon. Northern Japan has a similar climate. In Asia, this climate type

1040-484: The Dfa climate type is present near the Black Sea in southern Ukraine , the Southern Federal District of Russia , southern Moldova , Serbia , parts of southern Romania , and Bulgaria , but tends to be drier and can be even semi-arid in these places. In East Asia, this climate exhibits a monsoonal tendency with much higher precipitation in summer than in winter, and due to the effects of

1092-543: The Great Kantō earthquake , which heavily damaged Tokyo in September 1923; and the earthquake of March 2011 , which moved the northeastern part of the island by varying amounts of as much as 5.3 m (17 ft) while causing devastating tsunamis). The highest peak is the active volcano Mount Fuji at 3,776 m (12,388 ft), which makes Honshu the world's 7th highest island . There are many rivers, including

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1144-538: The Korean Peninsula , parts of Eastern Europe , parts of southern Ontario , much of the American Midwest , and the Northeast US , the climate combines hotter summer maxima and greater humidity (similar to those found in adjacent humid subtropical climates ) and moderately cold winters and more intermittent snow cover (averaging somewhat below freezing, too cold for a more temperate classification), and

1196-728: The Kurushima Kaikyō Bridge ; Shimotsui-Seto Bridge , Hitsuishijima Bridge , Iwakurojima Bridge , Yoshima Bridge , Kita Bisan-Seto Bridge , and the Minami Bisan-Seto Bridge ), the Seikan Tunnel connects Honshu with Hokkaidō, and the Kanmonkyo Bridge and Kanmon Tunnel connect Honshu with Kyūshū . These are notable flora and fauna of Honshu. Being on the Ring of Fire , the island of Honshu

1248-498: The Ogasawara Islands , Sado Island , Izu Ōshima , and Awaji Island . The regions and their prefectures are: Humid continental climate A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot (and often humid) summers, and cold (sometimes severely cold in

1300-533: The Shinano River , Japan's longest. The Japanese Alps span the width of Honshu, from the 'Sea of Japan' coast to the Pacific shore. The climate is generally humid subtropical in western Japan and humid continental in the north. Honshu has a total population of 104 million people, according to a 2017 estimate, 81.3% of the entire population of Japan. The largest city is Tokyo (population: 13,988,129),

1352-591: The Canadian Prairie Provinces and below 40°N in the high Appalachians . In Europe, this subtype reaches its most northerly latitude in Bodø at the 67°N . High-altitude locations such as Flagstaff, Arizona , Aspen, Colorado and Los Alamos, New Mexico in the western United States exhibit local Dfb climates. The south-central and southwestern Prairie Provinces also fits the Dfb criteria from

1404-547: The Western United States) grade into semi-arid climates with similar temperatures but low precipitation. A hot summer version of a continental climate features an average temperature of at least 22 °C (71.6 °F) in its warmest month. Since these regimes are restricted to the Northern Hemisphere, the warmest month is usually July or August. High temperatures during the warmest month tend to be in

1456-540: The capital of Japan and part of the Greater Tokyo Area , the most populous metropolitan area in the world. Honshu is connected to the islands of Hokkaidō, Kyūshū and Shikoku by tunnels and bridges. Three bridge systems have been built across the islands of the Inland Sea between Honshu and Shikoku ( Akashi Kaikyo Bridge and the Ōnaruto Bridge ; Shin-Onomichi Bridge , Innoshima Bridge , Ikuchi Bridge , Tatara Bridge , Ōmishima Bridge , Hakata–Ōshima Bridge , and

1508-459: The classification symbol defines seasonal rainfall as follows: while the third letter denotes the extent of summer heat: Within North America, moisture within this climate regime is supplied by the Great Lakes , Gulf of Mexico and adjacent western subtropical Atlantic . Precipitation is relatively well distributed year-round in many areas with this climate ( f ), while others may see

1560-620: The connection between the Sea of Japan and the Inland Sea . It is used by many cargo ships as a shortcut to Osaka and Tokyo from Korea and China. The New Kitakyushu Airport is also nearby. The New Kitakyushu Airport opened in Kitakyushu on March 16, 2006, and is expected to bring further prosperity in the form of increased tourism and trade to the area. Ferries from Shimonoseki Port International Terminal: Honshu Honshu had

1612-425: The continents either do not penetrate low enough in latitude or taper too much to have any place that gets the combination of snowy winters and hot summers. Marine influences are very strong around 40°S and such preclude Dfa , Dwa , and Dsa climates from existing in the southern hemisphere. Also known as hemiboreal climate , areas featuring this subtype of the continental climate have an average temperature in

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1664-651: The freezing mark (too cold for such a classification). More extreme and inland humid continental climates, sometimes known as "hyper-continental" climates, are found in northeast China , southern Siberia , Mongolia , Kazakhstan , most of the southern interior of Canada , and the Upper Midwest , where temperatures in the winter resemble those of adjacent subarctic climates (with long, drier, generally very cold winters) but have longer and generally warmer summers (in occasional cases, hot summers). A more moderate variety, found in places like Honshu , east-central China,

1716-526: The high 20s to low 30s °C (80s °F), while average January afternoon temperatures are near or well below freezing. Frost-free periods typically last 4 to 7 months in this climate regime. Within North America , this climate includes portions of the central and eastern United States from east of 100°W to south of about the 44°N to the Atlantic . Precipitation increases further eastward in this zone and

1768-439: The humid continental climate covers a much larger area than the hot subtype. In North America, the climate zone covers from about 42°N to 50°N latitude mostly east of 100°W , including parts of Southern Ontario , the southern half of Quebec , The Maritimes , and Newfoundland , as well as the northern United States from eastern North Dakota east to Maine . However, it can be found as far north as 54°N , and further west in

1820-512: The island's southern shore forms part of the Taiheiyō Belt , a megalopolis that spans several of the Japanese islands. Honshu contains Japan's highest mountain, Mount Fuji, and its largest lake, Lake Biwa . Most of Japan's industry is located in a belt running along Honshu's southern coast, from Tokyo to Nagoya , Kyōto , Osaka , Kobe , and Hiroshima ; by contrast, the economy along

1872-582: The larger ocean area at that latitude, smaller land mass, and the consequent greater maritime moderation. In the Northern Hemisphere, some of the humid continental climates, typically in around Hokkaido , Sakhalin Island , northeastern mainland Europe , Scandinavia , Nova Scotia , and Newfoundland are closer to the sea and heavily maritime-influenced and comparable to oceanic climates , with relatively cool summers, significant year-round precipitation (including high amounts of snow) and winters being just below

1924-422: The location in question must not be semi-arid or arid . The cooler Dfb , Dwb , and Dsb subtypes are also known as hemiboreal climates. Although amount of snowfall is not a factor used in defining the humid continental climate, snow during the winter in this type of climate is almost a guarantee, either intermittently throughout the winter months near the poleward or coastal margins, or persistently throughout

1976-617: The meltdown of 3 nuclear reactors at the Fukushima Daiichi Nuclear Power Plant , leading to the Fukushima nuclear disaster . Honshu island generates around US$ 3.5 trillion or more than 80% of Japan's GDP . Fruit, vegetables, grains, rice and cotton make up the main produce grown in Honshu. The Tohoku region, spanning the north-eastern part of the island, is notable for its rice production, with 65% of cultivated land being rice paddy fields – almost

2028-786: The migration of ice age megafauna . Surviving artifacts from this period include finely-crafted stone blades, similar to those found in Siberia . Honshu was the target of devastating air raids during the Pacific War of World War II . The first air raid to strike Honshu and the other home islands was the Doolittle Raid . With the introduction of the Boeing B-29 Superfortress , the firebombing of Tokyo culminated in Operation Meetinghouse ,

2080-640: The most destructive air raid in human history, which destroyed 16 square miles (41 km ; 10,000 acres) of central Tokyo , leaving an estimated 100,000 civilians dead, and over one million homeless. The war ended with the atomic bombings of Hiroshima and Nagasaki shortly before Japan's surrender and signing of the Japanese Instrument of Surrender on September 2, 1945, on board the USS ; Missouri  (BB-63) in Tokyo Bay . The island

2132-741: The most heavily used. The San'yō Shinkansen , connects the two largest cities in western Japan, Shin-Osaka in Osaka with Hakata Station in Fukuoka . Both the Tokaido Shinkansen and the Sanyo Shinkansen help form a continuous high-speed railway through the Taiheiyō Belt megalopolis. The island is divided into five nominal regions and contains 34 prefectures, including metropolitan Tokyo. Administratively, some smaller islands are included within these prefectures, notably including

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2184-467: The northern areas) and snowy winters. Precipitation is usually distributed throughout the year, but often these regions do have dry seasons. The definition of this climate in terms of temperature is as follows: the mean temperature of the coldest month must be below 0 °C (32.0 °F) or −3 °C (26.6 °F) depending on the isotherm, and there must be at least four months whose mean temperatures are at or above 10 °C (50 °F). In addition,

2236-701: The northwestern Sea of Japan coast is largely based on fishing and agriculture. The island is linked to the other three major Japanese islands by a number of bridges and tunnels. The island primarily shares two climates, with Northern Honshu having a mainly humid continental climate while the south has a humid subtropical climate . The name of the island, Honshū ( 本州 ) , directly translates to "main province" or "original land" in English. Humans first arrived in Honshu approximately 37,000 years ago, and likely earlier. The first humans to arrive in Honshu were Stone Age hunter-gatherers from Northeast Asia, likely following

2288-629: The rate of about 15 centimetres per annum, and dredging has made it possible to build the Kitakyushu Airport at low cost. Western maps from the 19th century also refer to this waterway as the Straits of Van der Capellen . The total population of the Kanmon area is about 1.3 million, counting the whole of Kitakyushu (approx. one million) and Shimonoseki (approx. 300,000), although detailed definitions vary widely (see Fukuoka–Kitakyushu ). The Kanmon Straits Summer Fireworks Festival

2340-537: The remnants thereof). Though humidity levels are often high in locations with humid continental climates, the "humid" designation means that the climate is not dry enough to be classified as semi-arid or arid . By definition, forests thrive within this climate. Biomes within this climate regime include temperate woodlands, temperate grasslands, temperate deciduous or evergreen forests, coniferous forests, and coniferous swamps. Within wetter areas, maple , spruce , pine , fir , and oak can be found. Fall foliage

2392-585: The steppe ( BSk ) climates. In the eastern and Midwestern United States, Pennsylvania , Ohio , Illinois , Indiana , southern New York , most of Connecticut and Rhode Island , and eastern Massachusetts fall into the hot-summer humid continental climate. In Canada, this climate type exists only over portions of Southern Ontario . In the Eastern Hemisphere, this climate regime is found within interior Eurasia and east-central Asia. Within Europe,

2444-488: The strong Siberian High much colder winter temperatures than similar latitudes around the world, however with lower snowfall, the exception being western Japan with its heavy snowfall. Tōhoku , between Tokyo and Hokkaidō and Western coast of Japan also has a climate with Köppen classification Dfa , but is wetter even than that part of North America with this climate type. A variant which has dry winters and hence relatively lower snowfall with monsoonal type summer rainfall

2496-435: The warmest month below 22 °C (72 °F). Summer high temperatures in this zone typically average between 21–28 °C (70–82 °F) during the daytime and the average temperatures in the coldest month are generally well or far below the −3 °C (27 °F) (or 0 °C (32.0 °F)) isotherm. Frost-free periods typically last 3–5 months. Heat spells lasting over a week are rare. The warm summer version of

2548-404: The west coast, spanning Niigata, Yamagata , and Akita Prefectures. Most of Japan's copper, lead, zinc and chromite is located on Honshu, along with smaller, scattered deposits of gold, silver, arsenic, sulfur and pyrite . The Tokaido Shinkansen , opened in 1964 between Tokyo and Shin-Ōsaka , is Japan's first high-speed rail line. It is the world's oldest high-speed rail line and one of

2600-430: The winter months elsewhere in the climate zone. Humid continental climates are generally found between latitudes 40° N and 60° N , within the central and northeastern portions of North America , Europe , and Asia . Occasionally, they can also be found at higher elevations above other more temperate climate types. They are rare in the Southern Hemisphere , limited to isolated high altitude locations, due to

2652-455: The −3 °C (27 °F) average temperature isotherm (line of equal temperature) was near the southern extent of winter snowpack . In the United States, it is more common to use the 0 °C [32.0 °F] isotherm instead. The 10 °C (50 °F) average temperature was found to be roughly the minimum temperature necessary for tree reproduction and growth. Wide temperature ranges are common within this climate zone. Second letter in

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2704-519: Was used in the Tokyo area and at the Aichi Expo 2005 . The Kanmon Straits can be crossed in a number of ways, the oldest of which are the ferries. There is a car ferry between Nishiminato (Kokura) and Hikinoshima (Shimonoseki) which takes about ten minutes, and a passenger ferry from Moji-ko to Shimonoseki (Karato wharf). There is also a bridge which carries an expressway. By far the most used method

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