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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 Okayama
G
A
35.7
1980
Ochiai Dam Hokkaido
R
A
35.3
2001
Ochiai Dam Gifu
G
P
33.3
1926
Ochiai Dam Yamagata
G
P
15.5
1958
Ochikoba Tameike Nagasaki
E
A
20.6
1926
Ochya Dam Nagasaki
G
W
24.4
1973
Oda No.1 ike Niigata
E
A
15.0
1931
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
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 Mie
E
A
15.1
1979
Ohhira-ike Oita
E
A
15.7
1969
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
2019
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
Ohkiribata Dam Kumamoto
E
A
23.0
1975
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 Kyoto
G
FP
61.4
1960
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 Toshuko Aichi
G
AWI
26.0
1961
Ohno-ike Osaka
E
A
15.7
1949
Ohno-ike Kyoto
E
AW
20.0
1936
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 Aichi
G
AW
69.4
2001
Ohshima Dam Gifu
G
FN
53.1
2018
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

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 Toyama
E
FNS
29.5
1998
Ohtani Dam Kumamoto
G
A
26.1
1940
Ohtani Dam Shimane
G
W
35.0
1957
Ohtani-ike Hyogo
E
A
16.6
1970
Ohtani-ike Ehime
E
A
37.0
1944
Ohtani-ike Kagawa
E
A
16.9
1959
Ohtani-ike Okayama
E
A
19.0
1915
Ohtani-ike Ehime
E
A
27.3
1920
Ohtani-ike Hiroshima
E
A
27.3
1990
Ohtani-ike Gifu
E
A
18.7
1914
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 Akita
G
FNW
27.5
2007
Ohuchi Dam Fukushima
R
P
102.0
1991
Ohuchi Dam Kagawa
G
FNW
26.0
1966
Ohuchibaru Dam Miyazaki
G
P
25.5
1956
Ohura Dam Okinawa
R
A
35.5
1980
Ohura Dam Saga
E
A
45.0
1987
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 Okayama
E
A
16.1
1938
Oji-ike Ehime
E
A
17.6
1951
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
Okutadami Dam Niigata
G
P
157.0
1960
Okutainai Dam Niigata
G
FNWP
82.0

Okuyama Dam Shiga
E
A
23.0
1971
Okuyama Dam Hiroshima
G
A
32.7
2009
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 Hokkaido
R
F
25.4
1994
Ozawa Dam Chiba
E
A
23.9
1992
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.

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