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project was carried out. The Tone River originally discharged into the Tokyo Bay, but was diverted to flow into the
Pacific Ocean (Kashima-nada); the courses of the rivers in this area were adequate to channel any overflow and avoid large floods. Lake Katori disappeared, and the desalination began of
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Over the centuries the sea decreased in size, a further cause of which was the deposition of volcanic ash from the nearby mountains and around Kantō. The volcanic ash fell in great quantity, and was also carried by the wind, by the rain, spilled into the rivers, from where it reached the Katori Sea
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The remains of the inland sea are present in the
Nishiura, Kitaura and Sotonasakaura lakes of the Kasumigaura and in the Teganuma and Inbanuma lagoons.
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and the
Pacific Ocean. Additionally the sediments and rocks that flowed in the rivers influenced the decrease in size of the Katori.
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the lakes and lagoons that it left behind. The project encouraged canal farming, and irrigation was actively developed.
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367:"歌垣発祥の地を訪ねる「筑波山・香取の海」(in Japanese) - To visit the birthplace of Utagaki「Mt. Tsukuba ・ Katori Sea」-"
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City, the recovery and development of the flooded lands and the sea became necessary, so the
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this article contains information from the existing
Japanese Knowledge (XXG) article at
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Kantō Plain in the 16th century, showing the Tone River discharging into the Tokyo Bay.
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39:(Holocene glacial retreat) area (shaded area) superimposed. The diagonal line around
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After thousands of years the land rose and the sea receded, and in the
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much of the area was covered by wetlands, lakes and lagoons.
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Map of the Kantō Plain from the early 20th century with the
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formerly located in the eastern part of the ancient
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281:was formed from the remains of the inland sea.
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255:was covered by the sea, due to the
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342:"中央構造線』復活（その1）－総論① (in Japanese)"
323:Suigō-Tsukuba Quasi-National Park
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416:Landforms of Ibaraki Prefecture
187:Rice transplanting Festival in
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421:Landforms of Chiba Prefecture
231:, between the prefectures of
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16:Vanished inland sea, Japan
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257:Holocene glacial retreat
346:ameblo.jp, July 8, 2016
219:refers to the vanished
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123:36.04028°N 140.39417°E
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128:36.04028; 140.39417
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291:Tokugawa Shogunate
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43:is the Katori Sea.
398:(Katori Sea) and
227:connected to the
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163:Ocean/sea sources
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402:(Jōmon Kaishin).
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279:Lake Kasumigaura
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189:Katori Shrine
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374:. Retrieved
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349:. Retrieved
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268:Kofun period
264:Yayoi period
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251:part of the
249:Jōmon period
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37:Jōmon period
376:November 1,
371:utakura.com
351:November 1,
289:During the
253:Kantō Plain
225:Kantō Plain
193:Katori City
157:and others.
126: /
114:140°23′39″E
101:Coordinates
410:Categories
328:References
303:Tone River
295:Edo period
285:Edo Period
277:Later the
243:Inland sea
239:in Japan.
221:inland sea
212:Katori Umi
200:Katori Sea
155:Kinu River
145:Inland sea
68:Katori Sea
22:Katori Sea
111:36°2′25″N
318:See also
266:and the
82:Location
310:Present
293:in the
247:In the
233:Ibaraki
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237:Chiba
94:Japan
400:縄文海進
378:2021
353:2021
235:and
198:The
140:Type
396:香取海
299:Edo
206:香取海
70:香取海
24:香取海
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203:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
