(D)：Difending Champion
| Date | Championships | Course | Venue | Champion | |
| 4/21 – 4/24 | Asia Golf Circuit Dunlop International Open Golf Championship | Ibaraki Golf Club East Course | IBARAKI | Larry Nelson | |
| 6/28 – 6/30 | 25th 1983 Japan Amateur Women’s Golf Championship | Narashino Country Club Queen Course | CHIBA | Toshie Matsubara | |
| 7/14 – 7/17 |  |
16th 1983 Japan Women’s Open Golf Championship | Awara Golf Club Sea Course | FUKUI | Ai-Yu Tu |
| 8/3 – 8/5 | 20th 1983 Japan Women’s Collegiate Golf Championship | Nishinomiya Country Club | HYOGO | Mieko Nomura | |
| 8/9 – 8/10 | 1983 Japan Junior Golf Championship Boys | Kasumigaseki Country Club East Course | SAITAMA | Ryoken Kawagishi | |
| 8/9 – 8/10 | 1983 Japan Junior Golf Championship Junior High School Boys | Kasumigaseki Country Club East Course | SAITAMA | Hideaki Sato | |
| 8/9 – 8/10 | 1983 Japan Junior Golf Championship Girls | Kasumigaseki Country Club East Course | SAITAMA | Aiko Hashimoto | |
| 8/23 – 8/24 | 37th 1983 Japan Collegiate Golf Championship | Ryugasaki Country Club | IBARAKI | Keiichi Nagata | |
| 9/7 – 9/10 | 68th 1983 Japan Amateur Golf Championship | Chiba Country Club Noda Course | CHIBA | Kazuhiko Kato | |
| 9/29 – 10/2 | |
48th 1983 Japan Open Golf Championship | Rokkokokusai Golf Club East/Center Course | HYOGO | Isao Aoki |
| 10/13 – 10/14 | 5th 1983 Japan Senior Golf Championship | Abiko Golf Club | CHIBA | Umekichi Yamaguchi | |