Osaka (J3-League): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-04 | Player | Osaka | Urartu | Free |
| 2026-07-01 | Kohei Isa | Oita Trinita | Osaka | Free |
| 2026-07-01 | Riku Umeda | Vegalta Sendai | Osaka | Loan |
| 2026-02-01 | Ryunosuke Sugawara | Vegalta Sendai | Osaka | Loan |
| 2026-02-01 | Ryusei Nose | Football Club Mito HollyHock | Osaka | Free |
| 2026-02-01 | Shunta Morimura | Football Club Mito HollyHock | Osaka | Loan |
| 2026-02-01 | Gentaro Yoshida | JEF United | Osaka | Loan |
| 2026-01-16 | Dong-yeol Lee | Osaka | Paju Citizen | Free |
| 2026-01-12 | Ma Sang-Hoon | Cheonan City | Osaka | Free |
| 2025-08-08 | Aoto Nanamure | V-Varen Nagasaki | Osaka | Loan |
| 2025-08-03 | Kohei Matsumoto | Osaka | Kamatamare Sanuki | Loan |
| 2025-07-25 | Player | Osaka | Albirex Niigata S | Free |
| 2025-07-25 | Player | Osaka | Albirex Niigata S | Loan |
| 2025-07-14 | Ryusei Nose | Football Club Mito HollyHock | Osaka | Loan |
| 2025-07-10 | Kakeru Sakamoto | Giravanz Kitakyushu | Osaka | Loan |
| 2025-07-07 | Kaito Hayashida | Osaka | Kamatamare Sanuki | Loan |
| 2025-03-13 | Vinícius Souza | Metta / LU | Osaka | Free |
| 2025-02-03 | Kang Seong-kook | Osaka | Hwaseong | Free |
| 2025-02-01 | Kohei Matsumoto | Ventforet Kofu | Osaka | Free |
| 2025-02-01 | Yuto Minakuchi | Sagamihara | Osaka | Free |