Station Capacity (MW ) Prefecture Coordinates Status Type Akiba Dam 127.1 Shizuoka 34°58′20″N 137°49′42″E / 34.97222°N 137.82833°E / 34.97222; 137.82833 (Akiba Dam ) Operational pumped storage Amagase Dam 92 Kyoto 34°52′51″N 135°49′41″E / 34.88083°N 135.82806°E / 34.88083; 135.82806 (Amagase Dam ) Operational conventional Arimine Dam 534 Toyama 36°29′22″N 137°26′55″E / 36.48944°N 137.44861°E / 36.48944; 137.44861 (Arimine Dam ) Operational conventional Dashidaira Dam 124 Operational Funagira Dam 32 Shizuoka 34°53′26″N 137°48′54″E / 34.89056°N 137.81500°E / 34.89056; 137.81500 (Funagira Dam ) Operational Hatanagi-I Hydroelectric Dam 137 Shizuoka 35°19′17″N 138°10′59″E / 35.32139°N 138.18306°E / 35.32139; 138.18306 (Hatanagi-I Hydroelectric Dam ) Operational pumped storage Hatanagi-II Hydroelectric Dam 85 Shizuoka 35°18′29″N 138°12′11″E / 35.30806°N 138.20306°E / 35.30806; 138.20306 (Hatanagi-II Hydroelectric Dam ) Operational pumped storage Hiraoka Dam 101 Nagano Operational Honkawa[6] 600 pumped storage Ikawa Dam 62 Shizuoka 35°12′38″N 138°13′22″E / 35.21056°N 138.22278°E / 35.21056; 138.22278 (Ikawa Dam ) Operational Ikehara Pumped Storage Plant 350 Operational pumped storage Imaichi Pumped Storage Plant 1,050 Tochigi 36°49′31″N 139°39′58″E / 36.82528°N 139.66611°E / 36.82528; 139.66611 (Imiachi Dam ) Operational pumped storage Kadonogawa Power Station 800 Operational pumped storage Kannagawa Hydropower Plant 2,820 Nagano 36°00′18″N 138°39′09″E / 36.00500°N 138.65250°E / 36.00500; 138.65250 (Kannagawa Hydropower Plant ) Operational pumped storage Kazunogawa Pumped Storage Plant 1,200 Yamanashi 35°43′07″N 138°55′47″E / 35.71861°N 138.92972°E / 35.71861; 138.92972 (Kazunogawa Pumped Storage Plant ) Operational pumped storage Kinugawa-Kurobe Dam 127 Operational Kisenyama Pumped Storage Plant 466 Kyoto 34°53′30″N 135°51′34″E / 34.89167°N 135.85944°E / 34.89167; 135.85944 (Kisenyama Pumped Storage Plant ) Operational pumped storage Konoyama Dam 126 Niigata Operational Kurobe Dam 335 Toyama 36°33′30″N 137°40′00″E / 36.55833°N 137.66667°E / 36.55833; 137.66667 (Kurobe Dam ) Operational Kuroda Dam 315 Aichi 35°11′14″N 137°28′34″E / 35.18722°N 137.47611°E / 35.18722; 137.47611 (Kuroda Dam ) Operational Maruyama Dam 185 Gifu 35°28′08″N 137°10′20″E / 35.46889°N 137.17222°E / 35.46889; 137.17222 (Maruyama Dam ) Operational Matsubara Dam 50.6 Oita 33°11′39″N 130°59′38″E / 33.19417°N 130.99389°E / 33.19417; 130.99389 (Matsubara Dam ) Masegawa Dam [6] 288 Operational Matanoagawa Pumped Storage Plant 1,200 Tottori 35°14′44″N 133°29′30″E / 35.24556°N 133.49167°E / 35.24556; 133.49167 (Matanoagawa Pumped Storage Plant ) Operational pumped storage Miboro Dam 215 Gifu 36°08′17.7″N 136°54′38.9″E / 36.138250°N 136.910806°E / 36.138250; 136.910806 (Miboro Dam ) Operational Midono Pumped Storage Plant [6] 122 Operational pumped storage Miho Dam 7.4 Kanagawa 35°24′37″N 139°02′30″E / 35.41028°N 139.04167°E / 35.41028; 139.04167 (Miho Dam ) Operational Misakubo Dam 50 Shizuoka 35°11′05″N 137°55′54″E / 35.18472°N 137.93167°E / 35.18472; 137.93167 (Misakubo Dam ) Operational Miyagase Dam 24 Kanagawa 35°32′26″N 139°15′09″E / 35.54056°N 139.25250°E / 35.54056; 139.25250 (Miyagase Dam ) Operational Miyanaka Dam 449 Niigata Operational Nagano Pumped Storage Plant 220 Operational pumped storage Niikappu Pumped Storage Plant 200 Operational pumped storage Nishiotaki Dam 234 Nagano Operational Numappara Pumped Storage Plant 675 Operational pumped storage Ohashi Dam 615 Kōchi 33°46′13″N 133°20′12″E / 33.77028°N 133.33667°E / 33.77028; 133.33667 (Ohashi Dam ) Operational pumped storage Ōigawa Dam 68.2 Shizuoka 35°09′53″N 138°08′34″E / 35.16472°N 138.14278°E / 35.16472; 138.14278 (Ōigawa Dam ) Operational Okawachi Pumped Storage Power Station [7] 1,280 Hyōgo Operational pumped storage Okukiyotsu Pumped Storage Power Station (1 & 2) 1,600 Niigata Operational pumped storage Okinawa Yanbaru Seawater Pumped Storage Power Station [8] 30 Okinawa 26°40′25″N 128°15′56″E / 26.67361°N 128.26556°E / 26.67361; 128.26556 (Okinawa Yanbaru Seawater Pumped Storage Power Station ) Operational pumped storage Okutadami Dam 560 Niigata/Fukushima 37°09′12″N 139°15′00″E / 37.15333°N 139.25000°E / 37.15333; 139.25000 (Okutadami Dam ) Operational conventional Okutataragi Pumped Storage Plant 1,932 Hyōgo 35°14′12″N 134°51′23″E / 35.23667°N 134.85639°E / 35.23667; 134.85639 (Okutataragi Pumped Storage Plant ) Operational pumped storage Okuyoshino Pumped Storage Plant 1,206 Nara 34°7′4″N 135°49′16″E / 34.11778°N 135.82111°E / 34.11778; 135.82111 (Okuyoshino Pumped Storage Power Station ) Operational pumped storage Otori Dam 182 Fukushima 37°12′53″N 139°12′50″E / 37.21472°N 139.21389°E / 37.21472; 139.21389 (Otori Dam ) Operational Sagami Dam 31 Kanagawa; 35°36′56″N 139°11′43″E / 35.61556°N 139.19528°E / 35.61556; 139.19528 (Sagami Dam ) Operational Sakuma Dam 350 Aichi 35°05′58″N 137°47′39″E / 35.09944°N 137.79417°E / 35.09944; 137.79417 (Sakuma Dam ) Operational conventional Sasamagawa Dam 58 Shizuoka 34°58′17″N 138°05′38″E / 34.97139°N 138.09389°E / 34.97139; 138.09389 (Sasamagawa Dam ) Operational Senzu Dam 22.2 Shizuoka 35°13′00″N 138°05′25″E / 35.21667°N 138.09028°E / 35.21667; 138.09028 (Senzu Dam ) Operational Shimogo Pumped Storage Power Station 1,000 Fukushima Operational pumped storage Shin-Takasegawa Pumped Storage Plant 1,280 Nagano 36°28′26″N 137°41′23″E / 36.47389°N 137.68972°E / 36.47389; 137.68972 (Shin-Takasegawa Pumped Storage Plant ) Operational pumped storage Shinanogawa Pumped Storage Plant 234 Operational pumped storage Shintoyone Pumped Storage Plant 1,125 Aichi 35°07′33″N 137°45′38″E / 35.12583°N 137.76056°E / 35.12583; 137.76056 (Shintoyone Pumped Storage Plant ) Operational pumped storage Shiobara Pumped Storage Plant 900 Tochigi Operational pumped storage Shiogō Dam 58 Shizuoka 35°00′05″N 138°05′15″E / 35.00139°N 138.08750°E / 35.00139; 138.08750 (Shiogō Dam ) Operational Shiroyama Dam 275 Kanagawa 35°35′09″N 139°17′22″E / 35.58583°N 139.28944°E / 35.58583; 139.28944 (Shiroyama Dam ) Operational Tagokura Dam 390 Fukushima 37°18′38″N 139°17′13″E / 37.31056°N 139.28694°E / 37.31056; 139.28694 (Tagokura Dam ) Operational Takami Pumped Storage Plant 200 Operational pumped storage Taki Dam 92 Fukushima 37°23′13″N 139°32′02″E / 37.38694°N 139.53389°E / 37.38694; 139.53389 (Taki Dam ) Operational Tamahara Pumped Storage Power Station 1,200 Gunma 36°46′56″N 139°03′23″E / 36.78222°N 139.05639°E / 36.78222; 139.05639 (Tamahara Pumped Storage Power Station ) Operational pumped storage Tashiro Dam 40.1 Shizuoka 35°29′55″N 138°14′47″E / 35.49861°N 138.24639°E / 35.49861; 138.24639 (Tashiro Dam ) Operational Tedorigawa I Dam 250 Operational Tokuyama Dam 153 Gifu 35°39′55″N 136°30′08″E / 35.66528°N 136.50222°E / 35.66528; 136.50222 (Tokuyama Dam ) Operational Okuyahagi Pumped Storage Power Station 1,160 Gifu 35°11′59″N 137°27′31″E / 35.19972°N 137.45861°E / 35.19972; 137.45861 (Tominaga Dam ) Operational pumped storage Yagisawa Pumped Storage Plant 240 Operational pumped storage Yomihaki Power Station 112 Operational