Kanda river. Departure to SUMIDA RIVER Traditional Cache
Kanda river. Departure to SUMIDA RIVER
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It is a corner of the Sumidagawa terrace.
It is a point that exceeds the last [Yanagibashi] if found in Ochanomizu in the Kanda river, and joins Sumidagawa.
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It flows originating east in the source on the Inokashira pond in the Tokyo Mitaka city Inokashira imperial gift park, and it joins Sumidagawa Ryougoku-bashi Bridge sideward it is in the boundary of Taito Ward and Chuo Ward and Sumida Ward. Passage extension 24.6km and valley areas 105.0km⊃2As small-and-medium-sized rivers in Tokyo, it extends to all sections though it flows in the center of a city by the maximum scale and it is extremely rare that it is an open ditch.
"Kanda water supply" had been used as getting water [shi] and water service in Edo before.
Former name of the Kanda river said, "Hirakawa", and was a river poured into the Hibiya creek where it had entered the south sink and present Marunouchi and Hibiya from the vicinity of the branch point of a present Nihonbashi river. At that time, this Hirakawa was a boundary of the Toyoshima county and the [**gen] county.
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Insertion prefecture [shita] Ieyasu Tokugawa repaired Hirakawa to secure the drinking water of Edo where the fresh water was not able to be obtained with the well satisfactorily in the beach, and maintained the Kanda water supply that made the Inokashira pond, [yo**teraike], and the queer positive temple pond a head of a river to Edo in 1590(positive 18-heaven year). Going out of the Inokashira pond by this repair, the confluence to [yo**] Terakawa and queer [seiterakawa], and the style parts became present appearances, and the Kanda water supply supplied water from the main stream in the river to amount of sink [te] Koishikawa and Hongo by Mejiro. Moreover, to flow to the duct that it dug and road 3 penetrates to new [to] through the excavated Edo style island (outer moat) that ran to Sumidagawa in the duct in the Hirakawa downstream as flood control measures back, it repaired. Among these, after the Meiji era, it dug, half [no] the west and the outer moat were buried, and the river channel in a present Nihonbashi river was approved to road 3.
It was planned to do for Hirakawa to moat about nature to harden the defense of Tohoku in the Edo castle, and [ta] style road was put up east and the substituted construction was done in the age of two Brigadier General [guntokugawa] [**chuu] the south sink from Koishikawa. Digging up this was divided because the plateau that was called a Kanda stand had expanded from Hongo in this construction ..the eastern from Suidobashi.., it passed, and an artificial valley was made in present Ochanomizu. It was made to join Sumidagawa east of Asakusabashi and the willow bridge from the Kanda stand to due east by using the river that was from the origin east of the Kanda stand. Former river channel of Hirakawa becomes a moat in the Edo castle being separated by this repair, and Hirakawa who came to flow east comes to be called "Kanda river". Suidobashi was built across the west of roadside canals of the Kanda stand, and it came to be able to supply the Kanda water supply to Nihonbashi. The old Hirakawa river channel and the Kanda river in Nihonbashi tie again, and are Nihonbashi rivers in the back.
隅田川テラスの一角です。
御茶ノ水から神田川を上って行くと最後の柳橋を越え、隅田川と合流する地点です。
＜＜地理＞＞
東京都三鷹市井の頭恩賜公園内にある井の頭池に源を発し東へ流れ、台東区、中央区と墨田区の境界にある両国橋脇で隅田川に合流する。流路延長24.6km、流域面積105.0km²と、東京都内における中小河川としては最大規模で、都心を流れているにも拘らず全区間にわたり開渠であることは極めて稀である。
かつては「神田上水」を取水し、江戸の水道として利用されていた。
神田川の元の名前は「平川」といい、現在の日本橋川の分流点付近から南流し、現在の丸の内・日比谷に入り込んでいた日比谷入江に注ぎ込む川であった。当時はこの平川が豊嶋郡と荏原郡の境界となっていた。
＜＜歴史＞＞
1590年（天正18年）に江戸に入府した徳川家康は、海辺で井戸によって真水を満足に得ることができない江戸の飲料水を確保するために平川を改修し、井の頭池と善福寺池、妙正寺池を水源とする神田上水を整備した。
この改修により井の頭池を出て善福寺川、妙正寺川と合流する上流部分は現在の姿となり、神田上水は川の本流から目白で分流して小石川、本郷に水を供給した。
また、後に水害対策として平川下流の流路を隅田川に通じる道三掘と新たに開削した江戸前島を貫通する流路（外濠）に流れるよう改修した。この内、明治以後に道三掘の西半分と外濠が埋められ、現在の日本橋川の河道が成立した。
二代将軍徳川秀忠の時代には、江戸城の東北の守りを固めるために平川を天然の堀とすることが企図され、小石川から南流していた流路を東に付け替える工事が行われた。
二代将軍徳川秀忠の時代には、江戸城の東北の守りを固めるために平川を天然の堀とすることが企図され、小石川から南流していた流路を東に付け替える工事が行われた。
神田台の東では、元からあった川を利用して神田台から真東に浅草橋、柳橋の東で隅田川に合流するようにした。
この改修によって、平川の元の河道は切り離されて江戸城の堀となり、東に流れるようになった平川は「神田川」と呼ばれるようになる。
神田台の掘割の西には水道橋が架けられ、神田上水は日本橋まで給水できるようになった。後に日本橋の旧平川河道と神田川は再び結び付けられ、日本橋川となっている。
Additional Hints
(Decrypt)
Sbez bs n plyvaqre
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