List of dams and reservoirs in Japan
Below is a list of dams and reservoirs in Japan. As a nation of islands and narrow, steep valleys, dams play a vital role in Japanese society as they are constructed primarily to control floods, supply water and generate hydroelectric power. The tallest dam in Japan is the 186 m (610 ft) high Kurobe Dam. The largest dam by structural volume in the country is the Tokuyama Dam with 13,700,000 m3 (17,900,000 cu yd) of rock-fill. Tokuyama also creates Japan's largest reservoir with a water volume of 660,000,000 m3 (540,000 acre⋅ft). Some of the dams are listed below by prefecture.
Dams by prefecture
Aichi Prefecture

Shintoyone Dam
- Kuroda Dam
- Sakuma Dam
- Shintoyone Dam
- Tominaga Dam
- Ure Dam
- Yahagi Dam
- Yamaguchi Dam (ja:山口ダム (愛知県))
Fukui Prefecture

Itoshiro Dam
Fukuoka Prefecture

Jinya Dam
Fukushima Prefecture

Okutadami Dam
Gifu Prefecture

Tokuyama Dam
- Asahi Dam
- Agigawa Dam
- Hatogaya Dam
- Hosobidani Dam
- Iwaya Dam
- Kamiōsu Dam
- Kobuchi Dam
- Kaneyama Dam
- Kasagi Dam
- Kawabe Dam
- Kuze Dam
- Kuguno Dam
- Maruyama Dam
- Mazegawa Dam
- Matsuno Dam
- Miboro Dam
- Nagura Dam
- Narude Dam
- Nishidaira Dam
- Ōi Dam
- Okurodani Dam
- Oshirakawa Dam
- Sakaigawa Dam
- Shimohara Dam
- Shimokotori Dam
- Shin'inotani Dam
- Takane Dam
- Tokuyama Dam
- Tsubawara Dam
- Yokoyama Dam
Gunma Prefecture

Ueno Dam
Hiroshima Prefecture

Asari Dam
Hokkaidō

Tokuyama Dam
Hyōgo Prefecture

Sengari Dam
Ibaraki Prefecture
Ishikawa Prefecture

Yoshinodani Dam
Iwate Prefecture

Isawa Dam
Kagoshima Prefecture

Tsuruda Dam
Kōchi Prefecture

Nagase Dam
Kyoto Prefecture

Amagase Dam
- Amagase Dam
- Hiyoshi Dam
- Kisen'yama Dam
- Ono Dam
- Segi Dam
- Takayama Dam
- Tsutenko Dam
Mie Prefecture

Hinachi Dam
Miyagi Prefecture

Naruko Dam
Miyazaki Prefecture

Tsukabaru Dam
Nagano Prefecture

Minamiaiki Dam

Nagawado Dam

Ōmachi Dam
- Achibake Dam
- Akiyama Dam
- Amekawa Dam
- Dorogawa Dam
- Haino Dam
- Hiraoka Dam
- Horikirizawa Dam
- Higashijo Dam
- Himekawa Dam
- Ikusaka Dam
- Ikuta Dam
- Inagawa Dam
- Inekoki Dam
- Iwakura Dam
- Koya Dam
- Kanabara Dam
- Katagiri Dam
- Kiso Dam
- Kitayama Dam
- Kōsaka Dam
- Koshibu Dam
- Lake Kutsuzawa Dam
- Makio Dam
- Matsukawa Dam
- Midono Dam
- Minakata Dam
- Miure Dam
- Minamiaiki Dam
- Minochi Dam
- Minowa Dam
- Misogawa Dam
- Lake Misuzu Dam
- Miwa Dam
- Mizukami Dam
- Nagawado Dam
- Nanakura Dam
- Narai Dam
- Nishiotaki Dam
- Nishiura Dam
- Odagiri Dam
- Okususobana Dam
- Ōmachi Dam
- Onikuma Dam
- Otakigawa Dam
- Saigawa Dam
- Sasadaira Dam
- Sawando Dam
- Sebadani Dam
- Sugadaira Dam
- Susobana Dam
- Taira Dam
- Takase Dam
- Takato Dam
- Tatsugasawa Dam
- Tokiwa Dam
- Toyooka Dam
- Uchimura Dam
- Wachino Dam
- Yamaguchi Dam
- Yasuoka Dam
- Yatategi Sabo Dam
- Yoji Dam
- Yokokawa Dam
- Yukawa Dam
- Yunose Dam
Niigata Prefecture

Agekawa Dam

Okumiomote Dam
- Aburumagawa Dam
- Agekawa Dam
- Asagawara Dam
- Futai Dam
- Iwafune Dam
- Kajigawa Dam
- Kakizakigawa Dam
- Kanose Dam
- Kasabori Dam
- Ketto Dam
- Kassa Dam
- Kassagawa Dam
- Konoyama Dam
- Kuromata Dam
- Kuromatagawa Dam
- Miomote Dam
- Miyanaka Dam
- Oishi Dam
- Okumiomote Dam
- Okutadami Dam
- Otani Dam
- Sagurigawa Dam
- Saruta Dam
- Sasagamine Dam
- Shozenji Dam
- Tainai Dam
- Tainaigawa Dam
- Takanosu Dam
- Toyomi Dam
- Uchinokura Dam
- Yamamoto Dam
Ōita Prefecture

Hakusui Dam
Okayama Prefecture

Takasegawa Dam
Okinawa Prefecture

Okukubi Dam
- Aha Dam
- Arakawa Dam
- Benoki Dam
- Fukuji Dam
- Fungawa Dam
- Haneji Dam
- Kanna Dam
- Kinjo Dam
- Kurashiki Dam
- Okukubi Dam
- Taiho Dam
Saga Prefecture

Hokuzan Dam
- Hokuzan Dam
- Kasegawa Dam
Saitama Prefecture

Shinsui Dam
- Futase Dam
- Gakkaku Dam
- Shimokubo Dam
- Shinsui Dam
- Takizawa Dam
- Tamayodo Dam
- Urayama Dam
- Yamaguchi Reservoir (Saitama) (ja:山口貯水池)
Shiga Prefecture

Odsuchi Dam
- Anegawa Dam
- Eigenji Dam
- Hinogawa Dam
- Odsuchi Dam
- Ohzuchi Dam
- Setagawa Dam
- Yasugawa Dam
Shimane Prefecture

Kijima Dam
- Hamahara Dam
- Kijima Dam
- Masudagawa Dam
- Minari Dam
- Nagami Dam
- Obara Dam
- Ohnagami Dam
- Ohnagami Dam
- Onbe Dam
- Shitsumi Dam
- Sufugawa Dam
- Yato Dam
Shizuoka Prefecture

Hatanagi No.2 Dam
Tochigi Prefecture

Kurobe Dam
- Chiburi Dam
- Dorobu Dam
- Higashikoya Dam
- Higashiarakawa Dam
- Ikari Dam
- Imaichi Dam
- Kawaji Dam
- Kawamata Dam
- Koami Dam
- Kurobe Dam
- Kuriyama Dam
- Miyama Dam
- Nishigoya Dam
- Nakaiwa Dam
- Nishiarakawa River Dam
- Sabigawa Dam
- Shiobara Dam
- Sunokobashi Tailings Dam
Tokushima Prefecture

Kawaguchi Dam
- Ikeda Dam
- Kawaguchi Dam
- Kominono Dam
- Matsuogawa Dam
- Nagayasuguchi Dam
- Nagoro Dam
- Natsuko Dam
- Otsutate Dam
Tokyo

Shiromaru Dam
- Lake Okutama Dam
- Shiromaru Dam
Tottori Prefecture

Matanoagawa Dam
- Kashou Dam
- Matanoagawa Dam
- Mitaki Dam
- Nishitakao Dam
- Okamidanitameike Dam
- Senjyosan Dam
- Sugasawa Dam
Toyama Prefecture

Komaki Dam
- Akao Dam
- Arimine Dam
- Asahiogawa Dam
- Fusegawa Dam
- Jinzugawa Dam
- Kadogawa Dam
- Kamiichigawa Dam
- Komaki Dam
- Koyadaira Dam
- Kumanogawa Dam
- Kurobe Dam
- Magawa Dam
- Mattate Dam
- Narude Dam
- Oguchigawa Dam
- Ohara Dam
- Omata Dam
- Sennindani Dam
- Senzoku Dam
- Shin Nakachiyama Dam
- Shiraiwagawa Dam
- Shogawa Goguchi Dam
- Soyama Dam
- Sukenobu Dam
- Toga Dam
- Togagawa Dam
- Tori Dam
- Unazuki Dam
- Wadagawa Dam
Yamagata Prefecture

Yokokawa Dam
- Akashiba Dam
- Arasawa Dam
- Atsumigawa Dam
- Bonjigawa Dam
- Gassan Dam
- Kamigo Dam
- Kanno Dam
- Kijiyama Dam
- Mizugatoro Dam
- Maekawa Dam
- Mizukubo Dam
- Nagai Dam
- Sagae Dam
- Shin'ochiai Dam
- Shirakawa Dam
- Shintsuruko Dam
- Tsunakigawa Dam
- Tsuruko Dam
- Yakuwa Dam
- Yokokawa Dam
- Zao Dam
Yamaguchi Prefecture

Simajigawa Dam
- Abugawa Dam
- Hirase Dam
- Ikimigawa Dam
- Kawakami Dam
- Kotougawa Dam
- Koudou Dam
- Koyagawa Dam
- Lake Abuko Dam
- Lake Shinjyuko Dam
- Lake Takaseko Dam
- Mishogawa Dam
- Mizukoshi Dam
- Ozegawa Dam
- Sasanamigawa Dam
- Shimajigawa Dam
- Sugano Dam
- Ubemaruyama Dam
- Yasaka Dam
- Yunohara Dam
Yamanashi Prefecture

Fukashiro Dam
- Amahata Dam
- Arakawa Dam
- Daimon Dam
- Fukashiro Dam
- Hirose Dam
- Kazunogawa Dam
- Kakimoto Dam
- Kamihikawa Dam
- Kotogawa Dam
- Nishiyama Dam
- Shiokawa Dam
- Shionosawa Dam
- Toshima Dam
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