| Seiya Yamaguchi 山口 聖矢 | |
| Fullname: | Seiya Yamaguchi |
| Birth Date: | 2 September 1993 |
| Birth Place: | Zama, Kanagawa, Japan |
| Position: | Defender |
| Currentclub: | SC Sagamihara |
| Clubnumber: | 30 |
| Youthyears1: | 2012–2015 |
| Youthclubs1: | Kanto Gakuin University |
| Years1: | 2016 |
| Caps1: | 2 |
| Goals1: | 0 |
| Years2: | 2017– |
| Caps2: | 1 |
| Goals2: | 0 |
| Club-Update: | 22 February 2018 |
is a Japanese football player. He plays for SC Sagamihara.
Seiya Yamaguchi joined Japanese Regional Leagues club Saurcos Fukui in 2016. In 2017, he moved to J3 League club SC Sagamihara.
Updated to 22 February 2018.[1]
| Club performance | League | Cup | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Season | Club | League | Apps | Goals | Apps | Goals | Apps | Goals | |
| Japan | League | Emperor's Cup | Total | ||||||
| 2016 | Saurcos Fukui | JRL (Hokushinetsu, Div. 1) | 2 | 0 | – | 2 | 0 | ||
| 2015 | SC Sagamihara | J3 League | 1 | 0 | – | 1 | 0 | ||
| Total | 3 | 0 | 0 | 0 | 3 | 0 | |||