Title Ochiai Aqueduct

  • Yamanashi
Topic(s):
Historic Sites/Castle Ruins World Heritage (Natural or Cultural)
Medium/Media of Use:
Interpretive Sign App, QR code, etc.
Text Length:
≤250 Words
FY Prepared:
2018
Associated Tourism Board:
Tsuru Farm Stay Promotion Council
Associated Address:
233 Igura, Tsuru-shi , Yamanashi

駒橋発電所落合水路橋


下から見ると、この古いレンガの建築物は普通の橋のように見えますが、実は、1秒当たり約25立方メートルの水を、近くの大月市にある駒橋発電所へ送っている水道橋です。1907年、駒橋発電所やその他多くの同様の水力発電所がこの地域に建てられました。日露戦争 (1904~05)中、工業生産のために、国が海外の化石燃料へ依存しているという問題が明らかになり、この依存を減らすことが目的でした。


ここにこんなに多くの発電所が建てられた理由は、この地域が東京に近いこと、また環境が水力発電に特に適していることです。富士山の近くにある、地下の豊かな水源と豊富な雨量に加えて、水の流れが常に高速を保てるよう、地面が理想的な傾斜に傾いています。現在、この橋は1世紀以上前の建設当時と同じように存在しています。現在の日本で今なお使われている数少ない建築物の1つです。

Ochiai Aqueduct


From below this aged brick structure looks like a normal bridge, but it is actually an aqueduct carrying roughly 25 cubic meters of water per second to the Komabashi Hydroelectric Power Plant in the nearby city of Otsuki. Dating back to 1907, the Komabashi Power Plant—and many similar hydroelectric stations—were built in this area to help reduce the country’s dependency on foreign fossil fuels for industrial production. This had become a problem during the Russo-Japanese War (1904–05).


The reasons so many power stations were constructed here are because of the area’s proximity to Tokyo, and because the environment was especially suitable for hydroelectric production. In addition to the rich underground water resources that exist near Mt. Fuji and the plentiful rainfall, the area’s ground descends at an ideal gradient to maintain a constantly high rate of water flow.


Today the bridge still stands as it did when it was constructed more than a century ago and is one of few such structures still in use in Japan.

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