Iwaki (J2-League): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Kaito Fujii | Fagiano Okayama Sports Club | Iwaki | Loan |
| 2026-07-01 | Yutaka Michiwaki | Avispa Fukuoka | Iwaki | Loan |
| 2026-07-01 | Takeshi Ushizawa | Football Club Mito HollyHock | Iwaki | Loan |
| 2026-07-01 | Wataru Iwashita | Roasso Kumamoto | Iwaki | Free |
| 2026-07-01 | Shuto Okaniwa | Shonan Bellmare | Iwaki | Loan |
| 2026-07-01 | Kazuki Dohana | Iwaki | Shonan Bellmare | Free |
| 2026-07-01 | William Owie | Iwaki | Vanraure Hachinohe | Free |
| 2026-07-01 | Haruto Murakami | Iwaki | Matsumoto Yamaga | Free |
| 2026-07-01 | Rintaro Yamauchi | Iwaki | Sagamihara | Free |
| 2026-07-01 | Iori Sakamoto | Iwaki | Rayluck Shiga | Loan |
| 2026-02-06 | William Owie | Hitachi Kashiwa Reysol | Iwaki | Free |
| 2026-02-01 | Sosuke Shibata | Shonan Bellmare | Iwaki | Free |
| 2026-02-01 | Ibuki Konno | Gamba Osaka | Iwaki | Free |
| 2026-02-01 | Shun Nakajima | Hitachi Kashiwa Reysol | Iwaki | Loan |
| 2026-02-01 | Ryo Nishitani | Tokyo Verdy | Iwaki | Free |
| 2026-02-01 | Yuma Tsujioka | Iwaki | Avispa Fukuoka | Free |
| 2026-02-01 | Jin Ikoma | Iwaki | Giravanz Kitakyushu | Loan |
| 2026-02-01 | Shuhei Shikano | Iwaki | Tochigi | Free |
| 2026-02-01 | Keita Shirawachi | Iwaki | Zweigen Kanazawa | Loan |
| 2026-02-01 | Yoshihito Kondo | Iwaki | Tochigi | Loan |