Oita Trinita (J2-League): every transfer in and out, fees paid and earned, squad market value, €300k spent.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-02 | Shunsuke Ono | Oita Trinita | Albirex Niigata S | Loan |
| 2026-07-01 | Koya Hayashida | Ventforet Kofu | Oita Trinita | Free |
| 2026-07-01 | Daigo Furukawa | Renofa Yamaguchi | Oita Trinita | Free |
| 2026-07-01 | Kimiya Moriyama | Avispa Fukuoka | Oita Trinita | Loan |
| 2026-07-01 | I. Oda | Matsumoto Yamaga | Oita Trinita | Free |
| 2026-07-01 | Seiya Inoue | Avispa Fukuoka | Oita Trinita | Loan |
| 2026-07-01 | Manato Yoshida | Oita Trinita | Sagan Tosu | Free |
| 2026-07-01 | Takuya Okamoto | Oita Trinita | Fujieda MYFC | Free |
| 2026-07-01 | Arata Kozakai | Oita Trinita | Ehime | Free |
| 2026-07-01 | Josei Sato | Oita Trinita | Kochi United | Loan |
| 2026-07-01 | Yusei Yashiki | Oita Trinita | Gifu | Loan |
| 2026-07-01 | Kohei Isa | Oita Trinita | Osaka | Free |
| 2026-07-01 | Atsuki Satsukawa | Oita Trinita | Kagoshima United | Loan |
| 2026-07-01 | Junya Nodake | Oita Trinita | ThespaKusatsu Gunma | Free |
| 2026-02-01 | Manato Yoshida | Yokohama Marinos | Oita Trinita | Free |
| 2026-02-01 | Patrick Verhon | Kawasaki Frontale | Oita Trinita | Loan |
| 2026-02-01 | Atsuki Satsukawa | Oita Trinita | Tochigi City | Loan |
| 2026-01-29 | Ren Ikeda | Oita Trinita | Ryūkyū | Free |
| 2026-01-28 | Derlan | Oita Trinita | Suwon FC | Free |
| 2026-01-12 | Naoki Nomura | Oita Trinita | Renofa Yamaguchi | Free |