(D)：Difending Champion
| Date | Championships | Course | Venue | Champion | |
| 4/20 – 4/23 | Asia Golf Circuit Dunlop Open Golf Championship | Ibaraki Golf Club West Course | IBARAKI | Terry Gale | |
| 6/6 – 6/8 | 31st 1989 Japan Women’s Amateur Golf Championship | Hiroshima Country Club Hachihommatsu Course | HIROSHIMA | Tomoe Fumihira | |
| 6/29 – 7/2 |  |
22nd 1989 Japan Women’s Open Golf Championship | Musashi Country Club Toyooka Course | SAITAMA | Hiromi Kobayashi |
| 7/4 – 7/7 | 74th 1989 Japan Amateur Golf Championship | Ryugasaki Country Club | IBARAKI | Kiyotaka Oie | |
| 8/8 – 8/9 | 26th 1989 Japan Women’s Collegiate Golf Championship | ABC Golf Club | HYOGO | Harumi Hyodo | |
| 8/9 – 8/11 | 1989 Japan Junior Golf Championship High School Boys | Kasumigaseki Country Club West Course | SAITAMA | Kazuyoshi Yonekura | |
| 8/10 – 8/11 | 1989 Japan Junior Golf Championship Middle School Boys | Kasumigaseki Country Club West Course | SAITAMA | Tetsuya Haraguchi | |
| 8/10 – 8/11 | 1989 Japan Junior Golf Championship Girls | Kasumigaseki Country Club West Course | SAITAMA | Akiko Fukushima | |
| 8/23 – 8/24 | 43rd 1989 Japan Collegiate Golf Championship | Katayamazu Golf Club West Course | ISHIKAWA | Eiichi Shimomuki | |
| 10/5 – 10/8 | |
54th 1989 Japan Open Golf Championship | Nagoya Golf Club | AICHI | Masashi Ozaki |
| 10/11 – 10/12 | 11th 1989 Japan Senior Golf Championship | Ikeda Country Club Satsukidaira/Ayaha Course | OSAKA | Hiroshi Nomiyama | |