| Maruman Open | |
| Location: | Japan |
| Establishment: | 1980 |
| Tour: | Japan Golf Tour |
| Format: | Stroke play |
| Final Year: | 1994 |
| Aggregate: | 264 Masahiro Kuramoto (1987) |
| To-Par: | −24 as above |
| Final Champion: |  David Ishii |
The Maruman Open was a professional golf tournament that was held in Japan. Founded in 1980 as the Descente Cup Hokkoku Open, it was an event on the Japan Golf Tour until 1994, except for 1984 when it was held without a title sponsor. It was hosted at several different courses.
| Year(s) | Host course | Location | |
|---|---|---|---|
| 1994 | Narita Springs Golf Club | Narita, Chiba | |
| 1989–1993 | Hatoyama Country Club | Hatoyama, Saitama | |
| 1987–1988 | Higashimatsuyama Country Club | Higashimatsuyama, Saitama | |
| 1980–1986 | Katayamazu Golf Club | Kaga, Ishikawa |
| Year | Tour | Winner | Score | To par | Margin of victory | Runner(s)-up | ||
|---|---|---|---|---|---|---|---|---|
| Maruman Open | ||||||||
| 1994 | 279 | −9 | Playoff | |||||
| 1993 | 272 | −16 | Playoff | |||||
| 1992 | 272 | −16 | 1 stroke | |||||
| 1991 | 274 | −14 | Playoff | |||||
| 1990 |  Masashi Ozaki (3) | 273 | −15 | 5 strokes | ||||
| 1989 | 278 | −10 | 1 stroke | |||||
| 1988 | Masashi Ozaki (2) | 207 | −6 | 3 strokes | ||||
| 1987 | 264 | −24 | 4 strokes | |||||
| 1986 | 276 | −12 | 3 strokes | |||||
| 1985 | 279 | −9 | 1 stroke | |||||
| Hokkoku Open | ||||||||
| 1984 | 279 | −9 | 3 strokes | [1] | ||||
| Descente Cup Hokkoku Open | ||||||||
| 1983 | 283 | −5 | 3 strokes | [2] | ||||
| 1982 | 276 | −12 | 2 strokes | |||||
| 1981 | 282 | −6 | 2 strokes | [3] | ||||
| 1980 | 278 | −10 | 4 strokes | [4] | ||||