| Japan Women's Open | |
| Location: | Varies – Awara, Fukui in 2023 |
| Establishment: | 1968 |
| Course: | Varies – Awara Golf Club in 2023 |
| Org: | Japan Golf Association |
| Tour: | LPGA of Japan Tour |
| Format: | Stroke play |
| Purse: | ¥150,000,000 |
| Month Played: | October |
| Aggregate: | 268 Nasa Hataoka (2017) |
| To-Par: | −20 Nasa Hataoka (2017) |
| Current Champion: |  Erika Hara |
The is Japan's national women's open golf championship. From 2006 (as of 2011) it is one of the two richest tournaments on the LPGA of Japan Tour, with a prize fund of 140 million Yen.
Tournament names through the years:
| Year | Champion | Venue | Location | Score | To par | Purse (¥) | Winner's share (¥) | |
|---|---|---|---|---|---|---|---|---|
| 2023 | Awara Golf Club, Sea Course | 273 | −15 | 150,000,000 | 30,000,000 | |||
| 2022 | Murasaki Country Club, Sumire Course | 285 | −3 | 150,000,000 | 30,000,000 | |||
| 2021 | Tomei Country Club | 270 | −14 | 150,000,000 | 30,000,000 | |||
| 2020 | Classic Golf Club | 272 | −16 | 112,500,000 | 22,500,000 | |||
| 2019 | Cocopa Resort Club, Queen's Course | 270 | −18 | 150,000,000 | 30,000,000 | |||
| 2018 | Chiba Country Club, Noda Course | 273 | −15 | 140,000,000 | 28,000,000 | |||
| 2017 | 268 | −20 | 140,000,000 | 28,000,000 | ||||
| 2016 | Nasa Hataoka (a) | Karasuyamajo Country Club, Sannomaru Course | 280 | −4 | 140,000,000 | 28,000,000 | ||
| 2015 | Katayamazu Golf Club, Hakusan Course | 286 | −2 | 140,000,000 | 28,000,000 | |||
| 2014 | 280 | −8 | 140,000,000 | 28,000,000 | ||||
| 2013 | Sagamihara Golf Club, East Course | 288 | E | 140,000,000 | 28,000,000 | |||
| 2012 | Yokohama County Club, West Course | 288 | E | 140,000,000 | 28,000,000 | |||
| 2011 | 292 | +12 | 140,000,000 | 28,000,000 | ||||
| 2010 | Otone Country Club, East Course | 276 | −12 | 140,000,000 | 28,000,000 | |||
| 2009 | 277 | −11 | 140,000,000 | 28,000,000 | ||||
| 2008 | Shiun Golf Club, Kajikawa Course | 284 | −4 | 140,000,000 | 28,000,000 | |||
| 2007 | 282 | −6 | 140,000,000 | 28,000,000 | ||||
| 2006 | 279 | −9 | 140,000,000 | 28,000,000 | ||||
| 2005 | Totsuka Country Club, West Course | 283 | −5 | 70,000,000 | 14,000,000 | |||
| 2004 | Hiroshima Country Club, Hachihonmatsu Course | 280 | −8 | 70,000,000 | 14,000,000 | |||
| 2003 | Chiba Country Club, Noda Course | 287 | −1 | 70,000,000 | 14,000,000 | |||
| 2002 | 278 | −14 | 70,000,000 | 14,000,000 | ||||
| 2001 | 302 | +14 | 70,000,000 | 14,000,000 | ||||
| 2000 | 293 | +5 | 70,000,000 | 14,000,000 | ||||
| 1999 | 281 | −7 | 70,000,000 | 14,000,000 | ||||
| 1998 | Miyoshi Country Club, West Course | 286 | −2 | 70,000,000 | 14,000,000 | |||
| 1997 | 295 | +7 | 70,000,000 | 14,000,000 | ||||
| 1996 | 291 | +3 | 70,000,000 | 14,000,000 | ||||
| 1995 | Ube Country Club, Mannenike West Course | 285 | −3 | 60,000,000 | 9,720,000 | |||
| 1994 | Musashi Country Club, Sasai Course | 287 | −1 | 60,000,000 | 10,800,000 | |||
| 1993 | 288 | E | 60,000,000 | 10,800,000 | ||||
| 1992 | 287 | −1 | 60,000,000 | 10,800,000 | ||||
| 1991 | Sapporo Golf Club, Wattsu Course | 292 | E | 50,000,000 | 9,000,000 | |||
| 1990 | 288 | E | 40,000,000 | 8,000,000 | ||||
| 1989 | Musashi Country Club, Toyooka Course | 289 | +1 | 40,000,000 | 8,000,000 | |||
| 1988 | 295 | −1 | 30,000,000 | 6,000,000 | ||||
| 1987 | 287 | −1 | 30,000,000 | 6,000,000 | ||||
| 1986 | 293 | −3 | 25,000,000 | 4,000,000 | ||||
| 1985 | 293 | −3 | 25,000,000 | 4,000,000 | ||||
| 1984 | 286 | −2 | 25,000,000 | 4,000,000 | ||||
| 1983 | Awara Country Club, Sea Course | 218 | −1 | 25,000,000 | 4,000,000 | |||
| 1982 | Forest Golf Club, West Course | 285 | −3 | 25,000,000 | 4,000,000 | |||
| 1981 | 213 | −3 | 20,000,000 | 3,000,000 | ||||
| 1980 | Kasugai Country Club, West Course | 216 | −6 | 20,000,000 | 3,000,000 | |||
| 1979 | Hiroshima Country Club, Hachihonmatsu Course | 218 | +2 | 20,000,000 | 3,000,000 | |||
| 1978 | 219 | E | 20,000,000 | 3,000,000 | ||||
| 1977 | Hanayashiki Golf Club, Hirono Course | 216 | −6 | 20,000,000 | 3,000,000 | |||
| 1976 | 220 | +1 | 20,000,000 | 3,000,000 | ||||
| 1975 | 225 | +3 | 15,000,000 | 2,500,000 | ||||
| 1974 | 224 | +8 | 10,000,000 | 2,000,000 | ||||
| 1973 | 219 | +3 | 5,000,000 | 1,000,000 | ||||
| 1972 | 224 | +5 | 2,390,000 | 600,000 | ||||
| 1971 | Otone Country Club, West Course | 221 | +5 | 2,020,000 | 500,000 | |||
| 1970 | 226 | +4 | 1,440,000 | 500,000 | ||||
| 1969 | 142 | −6 | 1,020,000 | 300,000 | ||||
| 1968 | 148 | E | 500,000 | 200,000 |