(D)：Difending Champion
| Date | Championships | Course | Venue | Champion | |
| 4/24 – 4/27 | Asia Golf Circuit Dunlop International Open Golf Championship | Ibaraki Golf Club East Course | IBARAKI | Hideto Shigenobu | |
| 6/18 – 6/20 | 28th 1986 Japan Women’s Amateur Golf Championship | Chiba Country Club Noda Course | CHIBA | Aiko Hashimoto | |
| 7/3 – 7/6 |  |
19th 1986 Japan Women’s Open Golf Championship | Omi Country Club | SHIGA | Ai-Yu Tu |
| 8/6 – 8/7 | 1986 Japan Junior Golf Championship High School Boys | Kasumigaseki Country Club West Course | SAITAMA | Tetsu Nishikawa | |
| 8/6 – 8/7 | 1986 Japan Junior Golf Championship Middle School Boys | Kasumigaseki Country Club West Course | SAITAMA | Kazuyoshi Yonekura | |
| 8/6 – 8/7 | 1986 Japan Junior Golf Championship Girls | Kasumigaseki Country Club West Course | SAITAMA | Mayumi Hirase | |
| 8/7 – 8/8 | 23rd 1986 Japan Women’s Collegiate Golf Championship | Nara Manyo Country Club | NARA | Rika Ishii | |
| 8/20 – 8/21 | 40th 1986 Japan Collegiate Golf Championship | Aichi Country Club | AICHI | Yoshihiro Azuma | |
| 9/11 – 9/13 | 71st 1986 Japan Amateur Golf Championship | Kumamoto Kuko Country Club | KUMAMOTO | Yoshihiro Ito | |
| 10/9 – 10/12 | |
51st 1986 Japan Open Golf Championship | Totsuka Country Club West Course | KANAGAWA | Tsuneyuki Nakajima |
| 10/15 – 10/16 | 8th 1986 Japan Senior Golf Championship | Hiroshima Country Club Hachihommatsu Course | HIROSHIMA | Kinji Ando | |