H. C. Sapporo: every transfer in and out, fees paid and earned, squad market value, €2.4m spent and €4.8m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-02-01 | Tomoki Takamine | H. C. Sapporo | Nagoya Grampus | Loan |
| 2026-01-12 | Tomoki Kondo | H. C. Sapporo | Yokohama F. M. | — |
| 2025-06-10 | Gun-hee Kim | H. C. Sapporo | Gangwon FC | — |
| 2025-06-08 | Seiya Baba | H. C. Sapporo | Kashiwa Reysol | — |
| 2025-06-02 | Daiki Miya | Nagoya Grampus | H. C. Sapporo | Loan |
| 2025-01-20 | Yuya Asano | H. C. Sapporo | Nagoya Grampus | — |
| 2025-01-20 | Tomoki Takamine | KV Kortrijk | H. C. Sapporo | — |
| 2025-01-20 | Daiki Suga | H. C. Sapporo | Sanf. Hiroshima | Free |
| 2025-01-20 | Daihachi Okamura | H. C. Sapporo | Machida Zelvia | — |
| 2024-07-09 | Takuro Kaneko | H. C. Sapporo | KV Kortrijk | — |
| 2024-01-10 | Sung-yun Gu | H. C. Sapporo | Kyoto Sanga | — |
| 2024-01-10 | Lucas Fernandes | H. C. Sapporo | Cerezo Osaka | Free |
| 2024-01-08 | Tsuyoshi Ogashiwa | H. C. Sapporo | FC Tokyo | €1.3m |
| 2024-01-08 | Tomoki Kondo | Yokohama FC | H. C. Sapporo | — |
| 2024-01-08 | Shunta Tanaka | H. C. Sapporo | Cerezo Osaka | — |
| 2024-01-08 | Shuhei Matsubara | H. C. Sapporo | Mito HollyHock | — |
| 2023-07-26 | Takuro Kaneko | H. C. Sapporo | Dinamo Zagreb | Loan |
| 2023-07-25 | Sung-yun Gu | H. C. Sapporo | Kyoto Sanga | Loan |
| 2023-02-01 | Yuto Iwasaki | H. C. Sapporo | Sagan Tosu | — |
| 2023-02-01 | Sung-yun Gu | Without Club | H. C. Sapporo | — |