| Seiya Yamaguchi | ||
| Birth Date | 1993-09-02 (age 30) | |
| Birth Place |  |
Kanagawa |
| Height | 174 cm | |
| Weight | 70 kg | |
| Position | Defender | |
| Club Statistics | ||||||
| Season | Club | No. | League | Game | Goal | |
| 2017 | |
SC Sagamihara | 19 | J3 | 1 | 0 |
| 2018 | |
SC Sagamihara | 30 | J3 | 0 | 0 |
| Total | J1 | 0 | 0 | |||
| J2 | 0 | 0 | ||||
| J3 | 1 | 0 | ||||
