(D)：Difending Champion
| Date | Championships | Course | Venue | Champion | |
| 4/19 – 4/22 | Asia Golf Circuit Dunlop International Open Golf Championship | Ibaraki Golf Club West Course | IBARAKI | John Jacobs | |
| 6/20 – 6/22 | 26th 1984 Japan Women’s Golf Championship | Shunan Country Club | YAMAGUCHI | Michiko Hattori | |
| 7/12 – 7/15 |  |
17th 1984 Japan Women’s Open Golf Championship | Kanra Country Club | GUNMA | Tatsuko Osako |
| 8/8 – 8/9 | 1984 Japan Junior Golf Championship Boys | Kasumigaseki Country Club East Course | SAITAMA | Ryoken Kawagishi | |
| 8/8 – 8/9 | 1984 Japan Junior Golf Championship Junior High School Boys | Kasumigaseki Country Club East Course | SAITAMA | Shigeki Maruyama | |
| 8/8 – 8/9 | 1984 Japan Junior Golf Championship Girls | Kasumigaseki Country Club East Course | SAITAMA | Asako Kita | |
| 8/9 – 8/10 | 21st 1984 Japan Women’s Collegiate Golf Championship | Awara Golf Club | FUKUI | Masae Yoshimura | |
| 8/22 – 8/23 | 38th 1984 Japan Collegiate Golf Championship | Kagoshima Kuko 36 Country Club Kuko Course | KAGOSHIMA | Taijiro Tanaka | |
| 9/11 – 9/13 | 69th 1984 Japan Amateur Golf Championship | Ibaraki Country Club West Course | OSAKA | Keiichi Nagata | |
| 10/4 – 10/7 | |
49th 1984 Japan Open Golf Championship | Ranzan Country Club | SAITAMA | Koichi Uehara |
| 10/17 – 10/18 | 6th 1984 Japan Senior Golf Championship | Gifu Country Club | GIFU | Yasuo Suzuki | |