[Back] 　[Dams in Japan] Dam table ［O］ Name of dam Prefecture Dam type Purpose Height FY Completed Obara Dam Shimane G FNW 90.0 2010 Obara-ike Okayama E A 15.0 1934 Obira Dam Hokkaido G FNAW 42.4 1992 Obuse Tameike Niigata E A 18.2 1932 Ochiai Dam Hokkaido R A 35.3 2001 Ochiai Dam Okayama G A 35.7 1980 Ochiai Dam Yamagata G P 15.5 1958 Ochiai Dam Gifu G P 33.3 1926 Ochikoba Tameike Nagasaki E A 20.6 1926 Ochya Dam Nagasaki G W 24.4 1973 Odagawa Dam Aomori R A 31.0 1975 Odagiri Dam Nagano G P 21.3 1954 Odakegochi Tameike Niigata E A 15.6 1933 Odate Dam Kagoshima A P 53.5 1963 Odayama-ike Hiroshima E A 15.6 1961 Ogasa-ike Shizuoka E A 24.6 1964 Ogawa Dam Fukuoka R A 37.0 1996 Ogi Dam Fukushima E A 27.8 1934 OgiribataDam(Re) Kumamoto E A 29.0 Ogkura Dam Nagasaki E AW 21.1 1975 Ogochi Dam Tokyo G WP 149.0 1957 Oguchi No.1 Dam (Pre) Ishikawa G P 28.4 1938 Oguchi No.1 Dam (Re) Ishikawa G P 26.9 2011 Oguchigawa Dam Toyama G P 72.0 1981 Ogura Dam Niigata R A 64.0 2006 Ogurami Dam Fukui E A 15.3 1900 Ogurkawa Dam Niigata E A 33.1 1964 Ohara Dam Toyama G P 52.0 1942 Ohara Dam (Pre) Fukui G P 35.5 1964 Ohara Dam (Re) Fukui G P 35.7 2012 Ohbara Choseichi Aichi R AW 47.9 1993 Ohbora Bosai Dam Gifu G FA 16.8 1952 Ohbora Dam Saitama G P 24.7 1960 Ohbuka Dam Akita G P 21.6 1961 Ohdairanuma Dam Fukushima FA AP 32.0 1970 Ohdani-ike Hiroshima E A 15.0 1949 Ohdo Dam Kochi G FNWP 96.0 1986 Ohdomari Dam Hiroshima G P 74.0 1958 Ohdutsumi Akita E A 15.6 1921 Ohfukasawa Dam Fukushima R A 36.5 1988 Ohgahora Dam Gifu G FNW 42.5 1998 Ohgaki Dam Fukushima R A 84.5 1988 Ohgayarindo Tameike Toyama E A 19.0 1931 Ohgidani-ike Hiroshima E A 17.5 1953 OhgotoDam Tochigi R A 27.7 1986 Ohhaga Dam Niigata E A 15.0 1935 Ohhara Dam (Pre) Shiga E A 27.4 1962 Ohhara Dam (Re) Shiga E A 27.4 2011 Ohhashi Dam Kochi G P 73.5 1939 Ohhira-ike Oita E A 15.7 1969 Ohhira-ike Mie E A 15.1 1979 Ohi Dam Gifu G P 53.4 1924 Ohi Dam (Pre) Fukuoka E W 29.0 1969 Ohi Dam (Re) Fukuoka E A 19.0 1978 Ohigawa Dam Shizuoka G P 33.5 1936 Ohi-ike Aichi E A 25.2 2010 Ohikami Dam Yamaguchi E A 17.5 1936 Oh-ike Okayama E FA 24.0 1987 Oh-ike Nagano E A 16.0 1927 Ohishi Dam Niigata G FP 87.0 1978 Ohitagawa Dam Oita R FNW 91.6 Ohkame-ike Hiroshima E A 15.0 1987 Ohkamidani Tameike Tottori E A 27.2 1973 Ohkawa Dam Fukushima GF FNAWIP 75.0 1987 Ohkawa Dam (Pre) Kagoshima R AW 33.7 1980 Ohkawa Dam (Re) Kagoshima R AW 49.2 1986 Ohkawahara Dam Nagasaki R A 25.3 1965 Ohkawase Dam Hyogo G AW 50.8 1991 Ohkochigawa Dam Yamaguchi G FNW 62.0 Ohkubo Dam Hiroshima E A 26.0 1974 Ohkubo Tameike Kumamoto E A 15.0 1914 Ohkuboyama Dam Ehime E AW 55.8 1979 Ohkumage-ike Oita E A 18.0 1969 Ohkuma-ike Shiga E A 16.0 1920 Ohkura Dam Miyagi MA FNAWIP 82.0 1961 Ohkuragawa Dam Shizuoka R F 45.0 1975 Ohkurodani Dam Gifu R P 34.0 1971 Ohma Dam Shizuoka G P 46.1 1938 Ohmachi Dam (Pre) Nagano G FNWP 107.0 1985 Ohmachi Dam (Re) Nagano G FNWP 107.0 Ohmachi-ohike Hyogo E A 25.5 1994 Ohmai Dam Oita G A 20.8 2001 Ohmata Dam Fukushima G P 18.5 1939 Ohmatazawa Dam Kanagawa G P 18.7 1917 Ohmatsugawa Dam Akita G FNAWP 65.0 1998 Ohmidani Dam Tokushima A P 31.5 1960 Ohmiya Dam Tottori G P 16.8 1940 Ohmorigawa Dam Kochi HG P 73.2 1959 OhnagamiDam Shimane G FNW 71.5 2003 Ohnakao Dam Oita E FA 25.4 1966 Ohnesaka Dam Nagasaki E A 15.1 1961 Ohnita Dam Gunma G FNW 54.4 2001 Ohno Dam Yamanashi E P 37.3 1914 Ohno Dam Iwate G A 26.0 2004 Ohno Dam Hokkaido G AW 47.5 2002 Ohno Dam Kyoto G FP 61.4 1960 Ohno Toshuko Aichi G AWI 26.0 1961 Ohno-ike Kyoto E AW 20.0 1936 Ohno-ike Osaka E A 15.7 1949 Ohnuma-ike Nagano E AW 15.6 1963 Ohonogawa Dam Niigata G FNW 47.0 1979 Ohro Dam Hyogo G FNW 32.1 1998 Ohsa Dam Okayama G FAP 43.7 1981 Ohsako Dam Nara A AWP 70.5 1973 Ohsawa Dam Hokkaido R F 28.9 2002 Ohsawa Dam Iwate G P 30.8 1943 Ohsawa-ike Nagano E A 15.3 1921 Ohseuchi Dam Miyazaki FA P 65.5 2007 Ohshida Dam Iwate G A 63.7 2004 Ohshima Dam Gifu G FN 53.1 Ohshima Dam Aichi G AW 69.4 2001 Ohshirakawa Dam Gifu R P 95.0 1963 Ohshirogawa Nochi Bosai Dam Shizuoka G FA 43.0 1968 Ohsio Dam Gunma E FA 31.9 1965 Ohso Dam Kumamoto R A 69.9 2019 Ohsugi Dam Hyogo E A 40.0 1974 Ohta Dam Niigata E FA 26.5 1996 Ohta No.1 Dam Hyogo R P 55.5 1995 Ohta No.2 Dam Hyogo R P 44.5 1995 Ohta No.3 Dam Hyogo R P 23.5 1995 Ohta No.4Dam Hyogo R P 29.3 1995 Ohta No.5Dam Hyogo R P 26.5 1995 Ohtabu Tameike Nagasaki E A 17.5 1944 Ohtagawa Dam Shizuoka G FNW 70.0 2008 Ohtake Dam Okayama G A 26.9 1980 Ohtaki Dam Nara G FNWIP 100.0 2012 Ohtakisawa Tameike Akita E A 26.6 1937 Ohtani Dam Niigata R FNW 75.5 1993 Ohtani Dam Shimane G W 35.0 1957 Ohtani Dam Kumamoto G A 26.1 1940 Ohtani Dam Toyama E FNS 29.5 1998 Ohtani-ike Hiroshima E A 27.3 1990 Ohtani-ike Kagawa E A 16.9 1959 Ohtani-ike Ehime E A 27.3 1920 Ohtani-ike Ehime E A 37.0 1944 Ohtani-ike Gifu E A 18.7 1914 Ohtani-ike Hyogo E A 16.6 1970 Ohtani-ike Okayama E A 19.0 1915 Ohtani-ike (Re) Osaka E A 18.7 1971 Ohto Dam Shimane G F 23.2 1959 Ohtodo Dam Hokkaido E FA 34.0 2003 Ohtoguchi Dam Hyogo E FA 23.3 1989 Ohtori Dam Fukushima GA P 83.0 1963 Ohtsu Dam Gunma G P 19.6 1931 Ohtsubogawa Dam Ishikawa R I 20.3 1992 Ohtsumata Dam Fukushima FA P 52.0 1968 Ohtsuro Dam Fukui G FNW 40.6 2011 Ohuchi Dam Kagawa G FNW 26.0 1966 Ohuchi Dam Fukushima R P 102.0 1991 Ohuchi Dam Akita G FNW 27.5 2007 Ohuchibaru Dam Miyazaki G P 25.5 1956 Ohura Dam Saga E A 45.0 1987 Ohura Dam Okinawa R A 35.5 1980 Ohyachi Dam Niigata E A 23.2 1989 Ohya-ike Okayama E A 18.1 1911 Ohyama Dam Oita G FNW 94.0 2012 Ohyama Oku-Ike Hiroshima E A 17.1 1943 Ohyodogawa No.1 Dam Miyazaki G P 47.0 1925 Ohyodogawa No.2 Choseichi Miyazaki G P 21.8 1931 Ohyoshizawa Tameike Akita E A 18.5 1934 Ohyubari Dam (Pre) Hokkaido G AP 67.5 1961 Ohzaka-ike Aichi E A 18.0 1953 Ohzano Dam Fukuoka E W 25.5 1974 Ohzaso Dam Fukushima E F 27.2 1962 Ohzo Dam Fukushima E A 16.6 1889 Ohzsemachi Dam Ishikawa E A 18.0 1954 Ohzuchi Dam Shiga R FNWI 43.5 1987 Oji-ike Ehime E A 17.6 1951 Oji-ike Okayama E A 16.1 1938 Oka Tameike Nagasaki E A 15.3 1934 Okawa Dam Kagawa G FN 36.0 1963 Okenouchi-ike Okayama E A 27.0 1951 Okinai Dam Hokkaido E FA 29.6 1995 Okita Dam Miyazaki G FN 36.0 2001 Okubo Dam Chiba E W 29.5 1981 Okuide Dam Kochi G A 18.7 1991 Okuizumi Dam Shizuoka G P 44.5 1955 Okukubi Dam (Re) Okinawa CSG FNAW 39.0 2013 Okumiomote Dam Niigata A FNP 116.0 2001 Okuniikappu Dam Hokkaido A P 61.2 1963 OkunoDam Shizuoka R FNW 63.0 1989 Okusaru Dam Hokkaido G P 30.0 1994 Okusato Dam Nara A P 20.5 1960 Okususobana Dam Nagano G FWP 59.0 1979 Okususobana Dam（Re） Nagano G FWP 59.0 Okutadami Dam Niigata G P 157.0 1960 Okutainai Dam Niigata G FP 82.0 2019 Okuyama Dam Hiroshima G A 32.7 2009 Okuyama Dam Shiga E A 23.0 1971 Okuyamanaka-ike Shizuoka E A 15.0 1997 Omata Dam Toyama G P 37.0 1960 Omogo Dam Ehime G AIP 73.5 1967 Omogo No.3 Dam Ehime G P 42.0 1984 Omu Dam Hokkaido R A 53.6 2009 Onagohata No.2 Choseichi Oita G P 34.3 1931 Onbara Dam Okayama B P 24.0 1927 Onbe Dam Shimane G FNP 63.0 1990 Ongi Dam Okayama G F 30.8 1987 Onigadake Dam Okayama G FA 39.0 1969 Onikuma Dam Nagano G FNW 36.5 2004 Onitori Tameike Nagasaki E A 22.0 1913 Onjuku Dam Chiba E W 23.5 1977 OnnaDam Okinawa G NA 28.5 1985 Onnebetsu Dam Hokkaido R A 33.7 1985 Onobaru Dam Oita E A 15.7 1962 Ononosawa Dam Hokkaido E A 16.8 1931 Onshi-ike Aichi E A 19.1 1990 Origawa Dam Gifu G FNP 114.0 2003 Osakabegawa Dam Okayama G AP 67.2 1954 Osaka-ike Okayama E A 24.6 1965 Oshigadani shimo-ike Okayama E A 16.0 1930 Oshigaki Dam Okinawa E A 18.5 1981 Oshino Tameike Yamanashi E A 27.4 1933 Oshirarika Dam Hokkaido R A 31.8 1966 Oshuku Dam Iwate G FA 17.5 1957 Osodani Dam Wakayama E P 26.5 1918 Osyozu-ike Fukuoka E A 19.2 1969 Otakigawa Dam Nagano G P 18.2 1948 Otobaru Dam Oita G W 17.2 1916 Otomi Dam Oita G FA 39.9 1970 Oya Dam Ishikawa R FNW 56.5 1992 Ozaki Dam Fukuoka G W 27.2 1978 Ozawa Dam Chiba E A 23.9 1992 Ozawa Dam Hokkaido R F 25.4 1994 Ozawa Tameike Gifu E A 32.0 1965 Ozegawa Dam Hiroshima G FIP 49.0 1964 Notes: 1. Dam purposes are abbreviated as follows: A: Agricultural irrigation   F: Flood control   I: Water supply for industry   N: Non-specified, river flow maintenance P: Hydropower   R: Recreation   S: Snow melting &removing   W: Water supply 2. Dam types are abbreviated as follows: A: Arch   B: Buttress   CSG: Trapezoidal CSG   E: Earthfill   FA: Asphalt face fill   FC: Asphalt core fill   G: Gravity GF: Gravity concrete & fill dam (compound)   HG: Hollow gravity   MA: Multi-arch   R: Rockfill 3. The fiscal year (FY) in Japan is from April 1 to March 31 of the following year. [Back] 　[Dams in Japan]