(D)：Defending Champion
| Date | Championships | Course | Venue | Champion | |
| 5/1～5/2 |
2025 Japan Women’s senior Open Golf Championship |
Tokyu Seven Hundred Club | CHIBA | YURI FUDO | |
| 6/17 – 6/20 | 66th 2025 Japan Women’s Amateur Golf Championship |
Meishin Yokaichi Country Club | SHIGA | RUNA NAKAZAWA | |
| 7/1～7/4 | 109th 2025 Japan Amateur Golf Championship |
Yokohama Country Club | YOKOHAMA | Kaito Sato | |
| 8/20～8/22 | 69th 2025 Japan Junior Golf Championship Presented by Ｓｋｙ Boy’s 15-17 Division |
Kasumigaseki Country Club East Course |
SAITAMA | AIRA NAGASAWA | |
| 8/20～8/22 | 69th 2025 Japan Junior Golf Championship Presented by Ｓｋｙ Boy’s 12-14 Division |
Tokyo Golf Club | SAITAMA | Taisei Nagasaki | |
| 8/20～8/22 | 69th 2025 Japan Junior Golf Championship Presented by Ｓｋｙ Girl’s 15-17 Division |
Kasumigaseki Country Club West Course |
SAITAMA | AIRA NAGASAWA | |
| 8/20～8/22 | 69th 2025 Japan Junior Golf Championship Presented by Ｓｋｙ Girl’s Division 12-14 |
Tokyo Golf Club | SAITAMA | YURINA HIROYOSHI | |
| 8/26～8/29 | 78th 2025 Japan Collegiate Golf Championship |
Hodaka Country Club | NAGANO | GUNMA TAMURA | |
| 8/27～8/29 | 61th 2025 Japan Women’s Collegiate Golf Championship |
Hodaka Country Club | NAGANO | MOMOKA KAMIYA | |
| 9/18～9/21 |  |
35th
2025 Japan Senior Open Golf Championship |
Sagamihara Golf Club | KANAGAWA | HCHOI HOSUNG |
| 10/2～10/5 |  |
58th 2025 Japan Women’s Open Golf Championship |
Cherry Hills Golf Club | HYOGO | RIO TAKEDA |
| 10/16～10/19 |  |
90th 2025 Japan Open Golf Championship |
Nikko Country Club | TOCHIGI | SHUGO IMAHIRA |
| 10/29～10/31 | 46th 2025 Japan Senior Golf Championship |
Hanno Golf Club | SAITAMA | Akio Mizukami | |
| 10/30～10/31 | 32th 2025 Japan Women’s Senior Golf Championship |
Gifu Seki Country Club | GIFU | JUNKO YAMAMOTO | |
| 11/6～11/7 | 31th 2025 Japan Mid-Senior Golf Championship |
Kooraku Golf Club | OKAYAMA | Sozo Utsu | |
| 11/6～11/7 | 2nd 2025 Japan Women’s Grand-Senior Golf Championship |
Sengari Country Club | HYOGO | ITSUKO MIKI | |
| 11/13～11/14 | 31th 2025 Japan Grand-Senior Golf Championship |
Ito Golf Club | FUKUOKA | TOSHIAKI TAMURA | |
| 11/13～11/14 | 29th 2025 Japan Women’s Mid-Amateur Golf Championship |
Awara Golf Club | FUKUI | SHINOKA OSADA | |
| 11/19～11/21 | 29th 2025 Japan Mid-Amateur Golf Championship |
Takinomiya Country Club | EHIME | Kazuma Inaba | |
| 11/26 | 15th 2025 J-sys Golf Tournament JGA Cup Men’s |
Miki Golf Club | HYOGO | Sumio Fukui | |
| 11/26 | 15th 2025 J-sys Golf Tournament JGA Cup Women’s |
Miki Golf Club | HYOGO | HIROMI YAMAMOTO | |
| Date | Championships | Course | Venue | |
| 9/15 | 18th 2025 All Japan Elementary Student Golf Tournament Boy’s Division |
Ashiya Country Club | HYOGO | |
| 9/15 | 16th 2025 All Japan Elementary Student Golf Tournament Girl’s Division |
Ashiya Country Club | HYOGO | |