Hydroelectric Power Station

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As of the end of FY2023

Total

  Number of Hydroelectric Power Station Maximum Output (kW)
Total 164 locations 9,794,158

Tochigi 23 locations (2,206,470kW)

Name of the water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Nakagawa Sawanagawa Sawanagawa Conduit 190 Oct-1925
Kurokawa
Yosasagawa
Kurokawa Conduit 920 Jul-1921
Osabigawa
Kosabigawa
Sabigawa Conduit 8,000 Sep-1961
Akagawa Akagawa Conduit 1,100 Jan-1929
Hokigawa Hokigawa Conduit 4,800 Jul-1943
Nabearisawagawa *Shiobara Dam/Conduit 900,000 Jun-1994
Tonegawa Kinugawa Kawamata Dam 27,000 Nov-1963
Kinugawa
Dorobugawa
Kuriyama Conduit 42,000 Mar-1944
Kinugawa Kinugawa Conduit 127,000 Nov-1963
Kinugawa Shioya Dam 9,200 Nov-1963
Kinugawa Takenosawa Conduit 8,600 Dec-1922
Kinugawa Nakaiwa Dam 4,600 Jan-1924
Kinugawa
Kodaiyagawa
Michiyabara Conduit 1,900 Aug-1922
Kinugawa Nishi-kinugawa Conduit 1,200 Apr-1928
Togawa *Imaichi Dam 1,050,000 Jul-1988
Togawa Dam 240 Jan-2011
Jigokugawa Shobugahama Conduit 450 Dec-1916
Daiyagawa Nikko-daiichi Conduit 1,300 May-1918
Nikko-daini Conduit 1,400 Oct-1893
Akazawa Conduit 1,370 Feb-1949
Tokorono-daiichi Conduit 4,200 Apr-1897
Tokorono-daini Conduit 5,600 Mar-1945
Tokorono-daisan Conduit 5,400 Dec-1952

Gunma 42 locations (2,827,630kW)

Name of water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Tonegawa Tonegawa 1*,2*Yagisawa Dam 160,000 Dec-1965
Tonegawa
Naramatagawa
Sudagai Dam 46,200 Sep-1955
Hocchigawa
Tonegawa
*Tamahara Dam/Conduit 1,200,000 Dec-1982
Tonegawa Fujiwara Dam 22,200 Dec-1956
Tonegawa
Takaragawa
Minakami Conduit 19,000 Aug-1953
Tonegawa Kamimoku Conduit 31,500 Nov-1958
Tonegawa
Yubisogawa
Komatsu Conduit 13,600 Nov-1922
Tonegawa
Akayagawa
Iwamoto Conduit 29,600 Mar-1949
Tonegawa
Agatsumagawa
Saku Conduit 78,200 Nov-1928
Tonegawa Maebashi Conduit 1,600 Aug-1933
Ayado Conduit 670 Apr-1998
Sugenuma
Nikamatagawa
Marunuma Conduit 4,300 Feb-1939
Marunuma
Ojirinuma
Ichinose Conduit 10,700 Dec-1937
Ogawa Shirane Conduit 10,500 Mar-1954
Katashinagawa
Ogawa
Kamata Conduit 11,800 Mar-1954
Katashinagawa
Kasashinagawa
Iosawa
Tokura Conduit 8,800 Oct-1962
Katashinagawa
Kasashinagawa
Sennotaki Conduit 3,000 Dec-1941
Katashinagawa
Ogawa
Nurigawa
Hataya Conduit 9,000 Nov-1927
Katashinagawa Chidori Conduit 2,300 Dec-1927
Katashinagawa
Hiragawa
Iwamuro Conduit 19,600 Jul-1915
Nerigawa
Akagisawagawa
Nerigawa Conduit 990 Dec-1920
Katashinagawa
Shirosawagawa
Usunegawa
Tazawagawa
Kamikuya Conduit 19,000 Jun-1925
Katashinagawa Fuseda Conduit 13,000 Oct-1926
Watarasegawa Fukuoka Conduit 7,400 Jan-1927
Agatsumagawa
Osawagawa
Oyokogawa
Kazawa Conduit 5,600 Oct-1926
Agatsumagawa
Manzagawa
Saikubo Conduit 12,800 Nov-1933
Agatsumagawa Imai Conduit 7,900 Aug-1925
Haneo Conduit 13,000 Oct-1925
Otsu Dam 2,000 Dec-1931
Kumagawa Kumagawa-daiichi Conduit 2,700 Mar-1922
Kumagawa-daini Conduit 1,600 Oct-1923
Shirosunagawa Kawanaka Conduit 14,600 Jul-1940
Agatsumagawa
Shirosunagawa
Matsuya Conduit 25,400 Dec-1929
Agatsumagawa
Shirosunagawa
Haramachi Conduit 27,800 Sep-1937
Nurugawa Atsuda Conduit 1,300 Nov-1914
Agatsumagawa
Shimagawa
Hakojima Conduit 26,200 Nov-1951
Agatsumagawa Kanai Conduit 14,200 Dec-1922
Shibukawa Conduit 6,800 Apr-1925
Karasugawa Muroda Conduit 1,300 Dec-1904
Satomi Conduit 1,200 Dec-1918
Kannagawa Torao Conduit 270 Nov-2011
Tonegawa
Shinanogawa
Kannagawa
Minamiaikigawa
*Kannagawa Dam/Conduit 940,000 Dec-2005

Tokyo 1 location (50kW)

Name of water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Kawadagawa Kawadagawa Mikurajima Conduit 50 Sep-1957

Kanagawa 12 locations (45,080kW)

Name of water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Ayuzawagawa Ayuzawagawa Mine Conduit 8,900 Mar-1910
Sakawagawa Kochigawa Arashi Conduit 5,700 Aug-1920
Yuzukugawa
Kochigawa
Omatagawa
Ochiai Conduit 7,000 Mar-1917
Sakawagawa Yamakita Conduit 7,000 Dec-1914
Uchiyama Conduit 3,900 Jan-1918
Fukuzawa-daiichi Conduit 1,460 Mar-1931
Fukuzawa-daini Conduit 1,030 Mar-1931
Hayakawa Hayakawa Kawakubo Conduit 1,800 Jul-1953
Tonosawa Conduit 3,800 Jul-1909
Yamazaki Conduit 990 Oct-1936
Sukumogawa
Osawagawa
Hatajuku Conduit 1,300 Sep-1941
Sukumogawa Sanmaibashi Conduit 2,200 Jul-1918

Yamanashi 29 locations (1,461,602kW)

Name of water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Sagamigawa Saiko Saiko Conduit 2,000 Mar-1919
Katsuragawa Kanegafuchi Conduit 2,660 Mar-1922
Oshino Conduit 860 Aug-1922
Katsuragawa
Osanogawa
Shishidome Conduit 18,400 Apr-1914
Katsuragawa
Rankangawa
Shakunagashigawa
Yamura Conduit 15,500 Dec-1920
Katsuragawa Kawamo Dam/Conduit 2,500 Feb-1924
Katsuragawa
Sugenogawa
Asahigawa
Komabashi Conduit 22,400 Dec-1907
Katsuragawa Yatsusawa Conduit 42,000 Jul-1912
Matsudome Conduit 1,440 Apr-1928
Fujigawa
Sagamigawa
Hikawa
Tsuchimurogawa
*Kazunogawa Dam/Conduit 1,200,000 Dec-1999
Sagamigawa Tsuchimurogawa Tsuchimurogawa Dam 350 Dec-1999
Fujigawa Fujigawa Kamanashigawa-daiichi Conduit 5,800 Dec-1926
Kamanashigawa-daini Conduit 6,200 Nov-1926
Kamanashigawa-daisan Conduit 1,000 Feb-1938
Komukawa Komukawa-daisan Conduit 2,200 Dec-1927
Komukawa-daiyon Conduit 1,100 Nov-1927
Shiokawa Egusa Conduit 3,000 May-1931
Daimongawa Tsugane Conduit 760 Sep-1924
Midaigawa
Kanayamazawagawa
Ashiyasu Conduit 1,300 Apr-1930
Hikawa Hajikano Conduit 1,750 Nov-1918
Kashio Conduit 2,400 May-1923
Arakawa Mitake Conduit 3,800 Aug-1927
Ashigawa Ashigawa-daiichi Conduit 470 Aug-1900
Ashigawa-daini Conduit 380 Jul-1906
Ashigawa-daisan Conduit 627 Jan-1912
Oigawa
Fujigawa
Oigawa
Uchikouchigawa
Tsuduragouchigawa
Nigorizawagawa
Tashirogawa-daiichi Conduit 17,400 Sep-1927
Oigawa
Horisawagawa
Uchikouchigawa
Tashitogawa-daini Conduit 22,700 Nov-1928
Fujigawa Hayakawa Hayakawa-daiichi Conduit 54,200 Jul-1923
Hayakawa-daisan Conduit 28,405 Dec-1926

Shizuoka 3 locations (18,400kW)

Name of water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Ayuzawagawa Sugawa Sugawa Conduit 6,000 Dec-1912
Ayuzawagawa
Sugawa
Mabusegawa
Suganuma Conduit 6,200 May-1925
Ayuzawagawa
Nozawagawa
Sugawa
Ikido Conduit 6,200 Feb-1930

Nagano 32 locations (2,504,800kW)

Name of water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Shinanogawa Chikumagawa Minowa Conduit 5,100 May-1921
Domura-daiichi Conduit 6,800 Dec-1919
Domura-daini Conduit 2,300 Dec-1919
Domura-daisan Conduit 1,050 May-1921
Hozumi Conduit 8,000 Nov-1925
Kaize Conduit 4,400 Nov-1925
Komoro Conduit 16,200 Sep-1927
Shimagawara Conduit 16,300 Nov-1930
Shiokawa Conduit 8,800 Oct-1938
Saikawa Ikusaka Dam 21,000 Aug-1964
Taira Dam 15,600 Nov-1957
Minouchi Dam/Conduit 31,600 Jan-1943
Sasadaira Dam 14,700 May-1954
Odagiri Dam 16,900 Aug-1954
Azusagawa Kasumizawa Conduit 39,000 Nov-1928
Azusagawa
Yugawa
Yugawa Conduit 17,400 Nov-1997
Azusagawa Sawando Conduit 4,000 Nov-1936
Azusagawa
Midonogawa
*Azumi Dam/Conduit 623,000 May-1969
Azusagawa *Midono Dam 245,000 Oct-1969
Inekoki Dam 510 Apr-1999
Ryushima Dam/Conduit 32,000 Jan-1969
Maekawa
Koonogawa
Maekawa Conduit 2,000 Dec-1927
Oshirakawa Oshirakawa Conduit 3,100 Nov-1925
Shimashimadanigawa Shimashimadani Conduit 2,700 Apr-1938
Takasegawa Takasegawa-daiichi Conduit 3,400 Dec-1922
Takasegawa-daigo Conduit 6,600 Jan-1925
*Shin-Takasegawa Dam/Conduit 1,280,000 Jun-1979
Nakanosawa Dam/Conduit 42,000 May-1980
Omachi Dam 13,200 Apr-1985
Kagogawa Omachishinsegi Conduit 1,040 May-2012
Nakatsugawa
Zakogawa
Kiriake Conduit 20,100 Nov-1955
Tochikawa Tochikawa Conduit 1,000 Dec-2010

Fukushima 15 locations (354,660kW)

Name of water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Aganogawa Inawashiroko Numagami Conduit 2,100 Jun-1899
Aganogawa
Abukumagawa
Inawashiroko
Gohyakugawa
Takenouchi Conduit 3,700 Jul-1919
Abukumagawa Gohyakugawa
Hisawagawa
Sainosawagawa
Marumori Conduit 5,900 Oct-1921
Aganogawa Hibarako Oguninuma
Onogawako
Nakatsugawa
Nagasegawa
Oshizawagawa
Onogawa Conduit 34,200 Dec-1937
Akimotoko
Nagasegawa
Akimoto Conduit 107,500 Feb-1940
Nagasegawa Numanokura Conduit 18,900 Dec-1946
Inawashiroko
Nippashigawa
Inawashiro-daiichi Conduit 63,400 Oct-1914
Nippashigawa Inawashiro-daini Conduit 37,500 Jun-1918
Inawashiro-daisan Conduit 23,200 Dec-1926
Nippashigawa Conduit 11,000 Apr-1912
Nippashigawa
Otanigawa
Inawashiro-daiyon Conduit 37,100 Nov-1926
Nippashigawa Kanagawa Conduit 7,100 Oct-1919
Inawashiroko
Nippashigawa
Tonokuchizeki-daiichi Conduit 1,490 Feb-1927
Nippashigawa
Kanayamagawa
Tonokuchizeki-daini Conduit 630 Jun-1919
Kanayamagawa Tonokuchizeki-daisan Conduit 940 Dec-1926

Niigata 7 locations (375,466kW)

Name of water system Name of the river Power station name Type Maximum Output
(kW)
Start of operation
Shinanogawa Nakatsugawa
Zakogawa
Nakatsugawa-daiichi Conduit 127,000 Sep-1924
Nakatsugawa Nakatsugawa-daini Conduit 22,500 Nov-1922
Shimofunato Conduit 6,600 Jan-1954
Shinanogawa Shinanogawa Conduit 181,000 Nov-1939
Kiyotsugawa
Asagaigawa
Kassagawa
Kiyotsugawa Conduit 16,300 Dec-1958
Kiyotsugawa Kiyotsugawa Conduit 16,100 May-1923
Uonogawa
Kiyotsugawa
Ishiuchi Conduit 5,966 Nov-1926

(Note)

  1. * indicates pumping-up hydroelectric power station.
  2. * Yagisawa was abolished in November 2022.

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