Asia-Pacific Open Golf Championship Diamond Cup Golf (2014-2019)
Sohbu Country Club (Sohbu Course), Chiba
2019
Yosuke Asaji (Japan)
Musashi Country Club (Sasai Course), Saitama
2018
Yuta Ikeda (Japan)
Caledonian Golf Club, Chiba
2017
Daisuke Kataoka (Japan)
Ibaraki Country Club (West Course), Osaka
2016
Chan Shih-chang (Chinese Taipei)
Ohtone Country Club (West Course), Ibaraki
2015
Kim Kyung-tae (Korea)
Ohtone Country Club (West Course), Ibaraki
2014
Hiroyuki Fujita (Japan)
Diamond Cup Golf (2010-2013)
Oarai Golf Club, Ibaraki
2013
Hideki Matsuyama (Japan)
The Country Club Japan, Chiba
2012
Hiroyuki Fujita (Japan)
Chiba Country Club (Umesato Course), Chiba
2011
Komei Oda (Japan)
Sayama Golf Club, Saitama
2010
Kim Kyung-tae (Korea)
Mitsubishi Diamond Cup Golf (2004-2009)
Oarai Golf Club, Ibaraki
2009
Takashi Kanemoto (Japan)
Higashi Hirono Golf Club, Hyogo
2008
Prayad Marksaeng (Thailand)
Oarai Golf Club, Ibaraki
2007
Tetsuji Hiratsuka (Japan)
Sayama Golf Club, Saitama
2006
Kamane Yokoo (Japan)
Higashi Hirono Golf Club, Hyogo
2005
IJ Jang (Korea)
Oarai Golf Club, Ibaraki
2004
Tetsuji Hiratsuka (Japan)
Diamond Cup Tournament (2001-2003)
Oarai Golf Club, Ibaraki
2003
Todd Hamilton (US)
Sayama Golf Club, Saitama
2002
Tsuneyuki 'Tommy' Nakajima (Japan)
Oarai Golf Club, Ibaraki
2001
Toshimitsu Izawa (Japan)
Mitsubishi Motors Tournament (1999-2000)
Gamo Golf Club, Shiga
2000
Hirofumi Miyase (Japan)
Lake Green Golf Club, Gifu
1999
Tsuyoshi Yoneyama (Japan)
Mitsubishi Galant Tournament (1977-1998)
Tosa Country Club, Kochi
1998
Toru Taniguchi (Japan)
Taiheiyo Club (Rokko Course), Hyogo
1997
Masashi 'Jumbo' Ozaki (Japan)
Oarai Golf Club, Ibaraki
1996
Masashi 'Jumbo' Ozaki (Japan)
Aso Prince Hotel Golf Course, Kumamoto
1995
Brandt Jobe (US)
Hokkaido Hayakita Country Club, Hokkaido
1994
Katsuyoshi Tomori (Japan)
Oarai Golf Club, Ibaraki
1993
TC Chen Tse-chung (Chinese Taipei)
Nanbufuji Country Club, Iwate
1992
Isao Aoki (Japan)
Noto Country Club, Ishikawa
1991
Koichi Suzuki (Japan)
Golden Valley Golf Club, Hyogo
1990
Isao Aoki (Japan)
Kumamoto Kuko Golf Club, Kumamoto
1989
Tateo 'Jet' Ozaki (Japan)
Onuma Lake Golf Club, Hokkaido
1988
Brian Jones (Australia)
Pine Lake Golf Club, Hyogo
1987
Brian Jones (Australia)
Oarai Golf Club, Ibaraki
1986
Tsuneyuki 'Tommy' Nakajima (Japan)
Kume Country Club, Okayama
1985
Graham Marsh (Australia)
Noto Country Club, Ishikawa
1984
Haruo Yasuda (Japan)
Nanbufuji Country Club, Iwate
1983
Tsuneyuki 'Tommy' Nakajima (Japan)
Kume Country Club, Okayama
1982
Graham Marsh (Australia)
Ohinata Country Club, Tochigi
1981
Lu Hsi-chuen (Chinese Taipei)
Meishin Youkaichi Country Club, Shiga
1980
Tsuneyuki 'Tommy' Nakajima (Japan)
Oarai Golf Club, Ibaraki
1979
Toru Nakamura (Japan)
Nanbufuji Country Club, Iwate
1978
Toru Nakamura (Japan)
Noto Country Club, Ishikawa
1977
Hsu Sheng-san (Chinese Taipei)
Dunlop Tournament (1969-1976)
Noto Country Club, Ishikawa
1976
Yoshikazu Yokoshima (Japan)
Noto Country Club, Ishikawa
1975
Norio Suzuki (Japan)
Anegasaki Country Club, Chiba
1974
Graham Marsh (Australia)
Tsurumai Country Club (West Course), Chiba
1973
Ben Arda (Philippines)
Mino Golf Club, Osaka
1972
Graham Marsh (Australia)
Mino Golf Club, Osaka
1971
Peter Thomson (Australia)
Mino Golf Club, Osaka
1970
Haruo Yasuda (Japan)
Mino Golf Club, Osaka
1969
Takaaki Kono (Japan)
