Montedio Yamagata (J2-League): every transfer in and out, fees paid and earned, squad market value, €150k spent.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Kaito Mori | Yokohama FC | Montedio Yamagata | Free |
| 2026-07-01 | Riku Morioka | Júbilo Iwata | Montedio Yamagata | Free |
| 2026-07-01 | Tsubasa Terayama | FC Tokyo | Montedio Yamagata | Free |
| 2026-07-01 | Wataru Tanaka | Montedio Yamagata | Kagoshima United | Free |
| 2026-07-01 | Jo Soma | Montedio Yamagata | ThespaKusatsu Gunma | Free |
| 2026-02-01 | Tsubasa Shibuya | Yokohama FC | Montedio Yamagata | Free |
| 2026-02-01 | Sora Hiraga | Kyoto Purple Sanga | Montedio Yamagata | Loan |
| 2026-02-01 | Takashi Abe | Montedio Yamagata | Tegevajaro Miyazaki | Loan |
| 2026-02-01 | Ryo Arita | Montedio Yamagata | Kagoshima United | Free |
| 2026-02-01 | Riku Terakado | Montedio Yamagata | Kataller Toyama | Free |
| 2026-01-19 | Beka Mikeltadze | Montedio Yamagata | Gimhae City | Free |
| 2026-01-12 | Thalisson | NK Olimpija | Montedio Yamagata | Free |
| 2026-01-12 | Dong-hee Lee | Football Club Pohang Steelers | Montedio Yamagata | Free |
| 2026-01-12 | Koki Sakamoto | Montedio Yamagata | Sagan Tosu | Free |
| 2025-08-12 | Yoshiki Fujimoto | Montedio Yamagata | Ehime | Free |
| 2025-07-25 | Keigo Enomoto | Fujieda MYFC | Montedio Yamagata | Free |
| 2025-07-24 | Tsubasa Terayama | FC Tokyo | Montedio Yamagata | Loan |
| 2025-07-24 | Tsubasa Shibuya | Yokohama FC | Montedio Yamagata | Loan |
| 2025-07-22 | Riku Terakado | Montedio Yamagata | Kagoshima United | Loan |
| 2025-07-17 | Zain Issaka | Montedio Yamagata | JEF United | Free |