35°24′31″N 139°53′54″E / 35.40861°N 139.89833°E / 35.40861; 139.89833
17-536: The Obitsu River ( 小櫃川 , Obitsu-gawa ) is a river in Kimitsu , Kisarazu , and Sodegaura , Chiba Prefecture , Japan . The river is 88 kilometers (55 mi) in length and has a drainage area of 273.2 square kilometers (105.5 sq mi). The Obitsu emerges from the densely forested valleys around Mount Motokiyosumi (344 meters (1,129 ft)) in the Bōsō Hill Range and empties into Tokyo Bay . It
34-555: Is formed from two kanji characters. The first, 京 , means " capital city " and refers to Tokyo. The second, 葉 , meaning " leaf ", is the second kanji in "Chiba" and refers to Chiba Prefecture, and the compound refers to the Tokyo-Chiba region. The Keiyō Industrial Zone spans the coast of Tokyo Bay from Urayasu in the northeast, through Funabashi , Chiba City , Kisarazu , Kimitsu , Ichihara , Sodegaura , and ends in Futtsu to
51-738: Is the second largest river in Chiba Prefecture after the Tone River (322 kilometers (200 mi)). The upper reaches of the Obitsu meander through Kimitsu, the middle of the river runs more directly through Kisarazu, and the lower reaches form and estuary and a triangular delta in Sodegaura, an area known as the Banzu Tidal Flats . The Obitsu then turns briefly west back into Kisarazu to empty into Tokyo Bay. The tidal flats of
68-694: The Yōrō River and the Koito River, small riverboats were used on the Obitsu. Rice , as the nengu tax tribute to the Tokugawa shogunate, passed from the former Kururi Region of Kimitsu to the port at Kisarazu, typically crossing a distance of 27.5 square kilometers (10.6 sq mi). Charcoal , an essential product in the Edo capital, was produced in the central region of the Boso Peninsula, and
85-555: The 1950s. Thermal power generators were built, and large tracts of land were reclaimed from the bay for expansion of the Keiyō region. Keiyō was significantly expanded in the 1960s. Heavy metal and chemical production were among the highest in Japan by the 1970s. The zone is a major base for the electric power generation , petrochemical , petroleum , shipbuilding , logistics , shipping , and steel industries. The Port of Chiba
102-662: The Keiyō Industrial Region, the Keiyō Industrial Area, or the Keiyō Industrial Belt, is an industrial zone on the northeastern coast of Tokyo Bay that crosses 8 cities in Chiba Prefecture , Japan . The zone spans from the western part of Urayasu in the northeast to Futtsu in the southeast of the region. The zone has no political or administrative status. The name of the industrial zone
119-536: The Obitsu River along Tokyo Bay were developed in the early 20th century to support growing industrial facilities along Tokyo Bay., and this area ultimately became an important part of the Keiyō Industrial Zone . Despite the large industrial development of the lower part of Obitsu River, the middle and upper ranges of the continue to be used extensively for rice and vegetable production. The Obitsu River in
136-412: The Obitsu host numerous species of birds and crustaceans . In 2012 an IUCN Red List endangered species crab, Uca lactea lactea , was discovered at the mouth of the river, and may be the northernmost habitat of the crab in Japan. The Koito River , similarly to the Obitsu, emerges from Mount Motokiyosumi, flows east across Bōsō Peninsula , and empties into Tokyo Bay. The two rivers are the longest in
153-470: The agriculture-rich middle and upper regions of the Obitsu developed slowly and reached its zenith on the Obitsu River in the Edo period (1603–1868). The Tokugawa shogunate showed strong interest in products from Kazusa Province . The shogunate excavated and straightened the meandering middle part of the Obitsu River to develop new paddy fields for the cultivation of rice and renkon lotus root . Like
170-592: The area around the Nagasuka, Kisarazu has historically been used for large-scale renkon lotus root cultivation. The low, damps areas of the river have been developed into rice paddy fields and fields for the production of lotus root. The renkon of the area became popular in the Tokyo area at the end of the Edo period, and remain in cultivation today. Additionally, the shallows at the Banzu Tidal Flats formed
187-632: The industrialization of Japan in the early 20th century. Reclaimed land areas replaced traditional fishing areas and supported small factories. The construction of the Kawasaki Steel Works in Chiba City in 1953 marked the beginning of the large-scale construction of heavy industry infrastructure in the industrial zone, and other industries soon followed. The deepwater ports of the Keiyō Industrial Zone were built starting in
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#1732790540474204-651: The largest area of nori seaweed cultivation in the Tokyo Bay region. Kimitsu, Chiba Too Many Requests If you report this error to the Wikimedia System Administrators, please include the details below. Request from 172.68.168.236 via cp1112 cp1112, Varnish XID 961370984 Upstream caches: cp1112 int Error: 429, Too Many Requests at Thu, 28 Nov 2024 10:42:20 GMT Keiy%C5%8D Industrial Zone Keiyō Industrial Zone ( 京葉工業地域 , Keiyō Kōgyō Chiiki ) , also known as
221-646: The largest in Japan, and the Gion Shell Mound ( 祇園貝塚 , Gion-kaizuka ) , along the Obitsu in the Gion District of Kisarazu, dates from the mid-Jōmon period. While there is some evidence of large-scale settlement along the Obitsu in the Yayoi period (300 BC–250 AD), the entire eastern Bōsō area was again richly populated in the Kofun period (250–538). Inland water transportation to connect
238-567: The southeast. Numerous small rivers empty into the industrial region, and provide a source of water to support industry. They include the Edo River , the Yōrō River , and the Koito River . Before industrialization the Keiyō region was originally home to nori seaweed collection, the shellfish industry, mixed small-scale fishing and agricultural villages, and beach resorts . The Keihin region , spanning west from Tokyo to Yokohama ,
255-725: The western region of the peninsula. The Kamegawa Dam was built near the Kazusa-Kameyama Station on the JR East Kururi Line on the upper part of the Obitsu River in 1979. The dam forms an artificial lake, Lake Kameyama . The lake is the largest reservoir in Chiba Prefecture with a diameter of 35 kilometers (22 mi). The Obitsu River supported a rich population in the Jōmon period (ca. 14,000–300 BC) as evidenced by large-scale kaizuka midden , or shell mounds. The shell mounds of Chiba Prefecture are
272-484: Was another essential trade product on the Obitsu. In the most prosperous period of the Obitsu River, there were 35 riverboats active in trade, and most were property of individual villages along middle and upper reaches of the river. The mouth of the Obitsu River became a lively trade center, as the Port of Kisarazu had exclusive rights to sea traffic between the western Bōsō Peninsula and the Edo capital. The lower parts of
289-446: Was developed after World War I . With the rapid development of the defense industry in Japan from the beginning of the Shōwa period in 1926, a plan for the decentralization of industry from the immediate Tokyo area was planned in 1935. The Keiyō Industrial Region was fully developed after World War II . Some land reclamation had been carried out in coastal areas of Tokyo Bay as part of
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