Omiya Ardija (J2-League): every transfer in and out, fees paid and earned, squad market value, €3.7m spent and €300k earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-16 | Oriola Sunday | Omiya Ardija | Sydney FC | Loan |
| 2026-07-06 | Carlinhos Junior | JEF United | Omiya Ardija | Free |
| 2026-07-02 | Ota Yamamoto | RB Leipzig | Omiya Ardija | Loan |
| 2026-07-01 | Suphanat Mueanta | Buriram United | Omiya Ardija | €2.5m |
| 2026-07-01 | Takuya Wada | Omiya Ardija | Ventforet Kofu | Free |
| 2026-07-01 | Fumiya Takayanagi | Omiya Ardija | Ryūkyū | Free |
| 2026-07-01 | Seiya Nakano | Omiya Ardija | Vanraure Hachinohe | Free |
| 2026-02-26 | Raisei Abe | Omiya Ardija | Tokyo Musashino City | Loan |
| 2026-02-11 | Arthur Silva | Omiya Ardija | Shonan Bellmare | Free |
| 2026-02-01 | Gen Kato | Nagoya Grampus Eight | Omiya Ardija | Loan |
| 2026-02-01 | Ota Yamamoto | Hitachi Kashiwa Reysol | Omiya Ardija | Loan |
| 2026-02-01 | Yusei Ozaki | Rakuten Vissel Kobe | Omiya Ardija | Loan |
| 2026-02-01 | Kazushi Fuji | Omiya Ardija | Ventforet Kofu | Loan |
| 2026-02-01 | Keita Fukui | Omiya Ardija | Ventforet Kofu | Loan |
| 2026-02-01 | Shosaku Yasumitsu | Omiya Ardija | Kataller Toyama | Loan |
| 2026-02-01 | Shunya Suzuki | Omiya Ardija | Tochigi | Loan |
| 2026-02-01 | Fumiya Takayanagi | Omiya Ardija | Gainare Tottori | Loan |
| 2026-01-12 | Hijiri Kato | Fagiano Okayama Sports Club | Omiya Ardija | Free |
| 2026-01-12 | Ryuya Nishio | Cerezo Osaka | Omiya Ardija | Free |
| 2026-01-12 | Wakaba Shimoguchi | Omiya Ardija | Shonan Bellmare | Free |