|Location||Rittō, Shiga in 2021|
|Course(s)||Biwako Country Club in 2021|
|Tour(s)||Japan Golf Tour|
The Japan Open Golf Championship (日本オープンゴルフ選手権競技, Nihon ōpun gorufu senshu kenkyōgi) is Japan's national open golf championship. Founded in 1927, it is one of the oldest professional golf tournaments in Japan.
The Japan Open is one of the three richest tournaments on the Japan Golf Tour, with a prize fund of ¥210 million in 2021; it is also the tour's designated "Flagship event" for the purposes of the Official World Golf Ranking, with a minimum winner's points allocation of 32 points. The winner also receives an invitation to the following year's Open Championship.
|Year||Champion||Score||To par||Margin of|
|2020||Yuki Inamori (2)||275||−5||1 stroke||Hideto Tanihara||31,500,000||Murasaki CC (Sumire)|
|2019||Chan Kim||285||+1||1 stroke|| Mikumu Horikawa |
|2018||Yuki Inamori||270||−14||2 strokes||Shaun Norris||40,000,000||Yokohama CC (West)|
|2017||Yuta Ikeda (2)||272||−8||1 stroke||Takumi Kanaya||40,000,000||Gifuseki CC|
|2016||Hideki Matsuyama||275||−5||3 strokes|| Yuta Ikeda |
|2015||Satoshi Kodaira||275||−13||1 stroke||Yuta Ikeda||40,000,000||Rokko Kokusai GC (East)|
|2014||Yuta Ikeda||270||−10||1 stroke|| Shingo Katayama |
|40,000,000||Chiba CC (Umesato)|
|2013||Masanori Kobayashi||274||−10||3 strokes||Koumei Oda||40,000,000||Ibaraki GC (East)|
|2012||Kenichi Kuboya||292||+8||1 stroke||Juvic Pagunsan||40,000,000||Naha GC|
|2011||Bae Sang-moon||282||−2||Playoff||Kenichi Kuboya||40,000,000||Takanodai CC|
|2010||Kim Kyung-tae||271||−13||1 stroke||Hiroyuki Fujita||40,000,000||Aichi CC|
|2009||Ryuichi Oda||282||−6||Playoff|| Yasuharu Imano |
|40,000,000||Musashi CC (Toyooka)|
|2008||Shingo Katayama (2)||283||−1||4 strokes||Ryo Ishikawa||40,000,000||Koga GC|
|2007||Toru Taniguchi (2)||283||−5||2 strokes||Shingo Katayama||40,000,000||Sagamihara GC (East)|
|2006||Paul Sheehan||277||−7||3 strokes||Azuma Yano||40,000,000||Kasumigaseki CC (West)|
|2005||Shingo Katayama||282||−2||2 strokes|| Ryoken Kawagishi |
|2004||Toru Taniguchi||285||−3||4 strokes|| Toshimitsu Izawa |
|24,000,000||Katayamazu GC (Hakusan)|
|2003||Keiichiro Fukabori||276||−8||2 strokes||Yasuharu Imano||24,000,000||Nikko CC|
|2002||David Smail||271||−9||4 strokes||Kim Jong-duck||24,000,000||Shimonoseki GC|
|2001||Taichi Teshima||277||−7||4 strokes||Tsuyoshi Yoneyama||24,000,000||Tokyo GC|
|2000||Naomichi Ozaki (2)||281||−3||1 stroke||Lin Keng-chi||24,000,000||Takanodai CC|
|1999||Naomichi Ozaki||298||+10||2 strokes|| Kazuhiko Hosokawa |
|1998||Hidemichi Tanaka||283||−5||1 stroke||Naomichi Ozaki||24,000,000||Oarai GC|
|1997||Craig Parry||286||+2||1 stroke|| Frankie Miñoza |
|1996||Peter Teravainen||282||−2||2 strokes||Frankie Miñoza||24,000,000||Ibaraki CC (West)|
|1995||Toshimitsu Izawa||277||−7||1 stroke||Kazuhiko Hosokawa||16,200,000||Kasumigaseki CC (East)|
|1994||Masashi Ozaki (5)||270||−18||13 strokes|| David Ishii |
|1993||Seiki Okuda||281||−3||5 strokes||Masashi Ozaki||18,000,000||Biwako CC|
|1992||Masashi Ozaki (4)||277||−11||5 strokes|| Brent Franklin |
|1991||Tsuneyuki Nakajima (4)||290||+2||Playoff||Noboru Sugai||18,000,000||Shimonoseki GC|
|1990||Tsuneyuki Nakajima (3)||281||−7||2 strokes||Masashi Ozaki||18,000,000||Otaru CC|
|1989||Masashi Ozaki (3)||274||−6||1 stroke||Brian Jones||10,000,000||Nagoya GC (Wago)|
|1988||Masashi Ozaki (2)||288||+4||1 stroke|| Isao Aoki |
|1987||Isao Aoki (2)||279||−9||1 stroke|| Tsuneyuki Nakajima |
|10,000,000||Arima Royal GC|
|1986||Tsuneyuki Nakajima (2)||284||−4||1 stroke|| Isao Aoki |
|10,000,000||Totsuka CC (West)|
|1985||Tsuneyuki Nakajima||285||−3||2 strokes||Hiroshi Makino||10,000,000||Higashinagoya CC|
|1984||Koichi Uehara||283||−5||2 strokes||Koichi Suzuki||10,000,000||Ranzan CC|
|1983||Isao Aoki||281||−7||Playoff||Terry Gale||8,000,000||Rokko Kokusai GC|
|1982||Akira Yabe||277||−7||5 strokes|| Yutaka Hagawa |
|8,000,000||Musashi CC (Toyooka)|
|1981||Yutaka Hagawa||280||E||1 stroke|| Kenji Mori |
|8,000,000||Nihon Line GC|
|1980||Shoji Kikuchi||296||E||1 stroke|| Isao Aoki |
|8,000,000||Sagamihara GC (East)|
|1979||Kuo Chie-Hsiung||285||−3||Playoff|| Isao Aoki |
|1978||Seve Ballesteros (2)||281||−7||Playoff||Graham Marsh||10,000,000||Yokohama CC (West)|
|1977||Seve Ballesteros||284||E||1 stroke||Takashi Murakami||10,000,000||Narashino CC|
|1976||Kosaku Shimada||288||−4||1 stroke|| Tōru Nakamura |
|10,000,000||Central GC (East)|
|1975||Takashi Murakami||278||−10||3 strokes||Seiichi Kanai||8,000,000||Kasugai CC (East)|
|1974||Masashi Ozaki||279||−13||1 stroke||Takashi Murakami||6,000,000||Central GC (East)|
|1973||Ben Arda||278||−10||2 strokes||Isao Aoki||4,500,000||Ibaraki CC (West)|
|1972||Han Chang-sang||278||1 stroke||Masashi Ozaki||Otone CC (East)|
|1971||Yoshimasa Fujii||282||Playoff||Hideyo Sugimoto||Aichi CC|
|1970||Mitsuhiro Kitta||282||1 stroke||Isao Aoki||Musashi CC (Sasai)|
|1969||Hideyo Sugimoto||284||1 stroke||Shigeru Uchida||Ono GC|
|1968||Takaaki Kono||284||1 stroke|| Kikuo Arai |
|Sobu CC (East & Middle)|
|1967||Tadashi Kitta||282||3 strokes|| Tomoo Ishii |
|1966||Seiichi Sato||285||1 stroke|| Chen Ching-Po |
|1965||Tadashi Kitta||284||1 stroke|| Seiji Kumada |
|1964||Hideyo Sugimoto||288||1 stroke|| Chen Ching-Po |
|1963||Toichiro Toda||283||2 strokes||Teruo Sugihara||Yokkaichi CC|
|1962||Teruo Sugihara||287||2 strokes||Chen Ching-Po||Chiba CC (Umesato)|
|1961||Kenji Hosoishi||289||Playoff|| Chen Ching-Po |
|1960||Haruyoshi Kobari||294||5 strokes|| Yoshimasa Fujii |
|1959||Chen Ching-Po||296||Playoff||Yumasa Shimamura||Sagamihara GC|
|1958||Torakichi Nakamura||288||4 strokes||Yoshiro Hayashi||Takanodai CC|
|1957||Haruyoshi Kobari||288||6 strokes||Tomoo Ishii||Aichi CC|
|1956||Torakichi Nakamura||285||8 strokes||Haruyoshi Kobari||Kasumigaseki GC (West)|
|1955||Koichi Ono||291||5 strokes||Chin Sei-Sui||Hirono GC|
|1954||Yoshiro Hayashi||293||3 strokes|| Michio Ishii |
|1953||Son Shi-Kin||291||1 stroke||Torakichi Nakamura||Takarazuka GC|
|1952||Torakichi Nakamura||279||11 strokes||Shigeru Ishii||Kawana Hotel (Fuji)|
|1951||Son Shi-Kin||288||3 strokes||Koshio Kurihara||Naruo GC|
|1950||Yoshiro Hayashi||288||1 stroke||Yumasa Shimamura||Abiko GC|
|1942–49: No tournament due to World War II|
|1941||Tokuharu Nobuhara||290||3 strokes||Torakichi Nakamura||Hodogaya CC|
|1940||Tomekichi Miyamoto||285||2 strokes||Toichiro Toda||Tokyo GC (Asaka)|
|1939||Toichiro Toda||287||5 strokes||Chin Sei-Sui||Hirono GC|
|1938||Rin Man-Puku||294||3 strokes||Toichiro Toda||Fujisawa CC|
|1937||Chin Sei-Sui||284||7 strokes||Rokuzo Asami||Sagami CC|
|1936||Tomekichi Miyamoto||293||1 stroke||Chin Sei-Sui||Naruo GC|
|1935||Tomekichi Miyamoto||296||8 strokes||Toichiro Toda||Tokyo GC (Asaka)|
|1934||No tournament due to flood damage|
|1933||Kanekichi Nakamura||294||9 strokes|| Chin Sei-Sui |
|Kasumigaseki CC (East)|
|1932||Tomekichi Miyamoto||298||1 stroke||Akira Muraki||Ibaraki CC|
|1931||Rokuzo Asami||281||4 strokes||Tomekichi Miyamoto||Hodogaya CC|
|1930||Tomekichi Miyamoto||287||19 strokes||Kokichi Yasuda||Ibaraki CC|
|1929||Tomekichi Miyamoto||298||2 strokes||Kokichi Yasuda||Ibaraki CC|
|1928||Rokuzo Asami||301||7 strokes||Kokichi Yasuda||Tokyo GC (Komazawa)|
|1927||Rokuro Akahoshi||309||10 strokes||Rokuzo Asami||Hodogaya CC|
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