High School (J): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-02-01 | Shota Yamashita | High School (J) | Mito HollyHock | Free |
| 2025-02-01 | Uwabright Hayakawa | High School (J) | Mito HollyHock | Free |
| 2024-02-01 | Yota Fujii | High School (J) | Fagiano Okayama | Free |
| 2023-04-01 | Shusuke Furuya | High School (J) | Tokyo Int Univ. | Free |
| 2023-04-01 | Kokoro Maeda | High School (J) | Kanagawa Uni | Free |
| 2023-04-01 | Aruto Higuchi | High School (J) | Chubu Univ. | Free |
| 2022-04-01 | Rei Shimano | High School (J) | Meiji Uni | Free |
| 2022-04-01 | Mitsuki Hidaka | High School (J) | Vissel Kobe | Free |
| 2022-04-01 | Kirato Sasaki | High School (J) | Kanto G. Univ. | Free |
| 2022-04-01 | David Aizawa | High School (J) | Hosei Univ. | Free |
| 2022-02-01 | Takumi Tsuchiya | High School (J) | Kashiwa Reysol | Free |
| 2022-02-01 | Junnosuke Suzuki | High School (J) | Shonan Bellmare | Free |
| 2021-04-01 | Temmu Matsumoto | High School (J) | Niigata Uni H&W | Free |
| 2021-04-01 | Taisei Inoue | High School (J) | Juntendo Univ. | Free |
| 2021-04-01 | Kenta Nemoto | High School (J) | RKU | Free |
| 2021-04-01 | Hayata Yamamoto | High School (J) | Senshu Univ. | Free |
| 2021-02-01 | Hiroshi Omori | High School (J) | Tokushima Vort. | Free |
| 2020-08-01 | Yutaro Tsukada | High School (J) | Daytona State | Free |
| 2020-04-01 | Yuma Tsujioka | High School (J) | Int'l Pacific U | Free |
| 2020-04-01 | Rin Mito | High School (J) | Kwansei Gakuin | Free |