| Tetsuharu Yamaguchi 山口 哲治 | |
| Fullname: | Tetsuharu Yamaguchi |
| Birth Date: | 8 September 1977 |
| Birth Place: | Nagasaki, Japan |
| Position: | Goalkeeper |
| Youthyears1: | 1993–1995 |
| Youthclubs1: | Isahaya Commercial High School |
| Years1: | 1996–1998 |
| Clubs1: | Sanfrecce Hiroshima |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 1999–2002 |
| Clubs2: | Sagan Tosu |
| Caps2: | 57 |
| Goals2: | 0 |
| Totalcaps: | 57 |
| Totalgoals: | 0 |
is a former Japanese football player.
Yamaguchi was born in Nagasaki Prefecture on September 8, 1977. After graduating from high school, he joined J1 League club Sanfrecce Hiroshima in 1996. However he could hardly play in the match behind Kazuya Maekawa and Takashi Shimoda until 1998. In 1999, he moved to newly was promoted to J2 League club, Sagan Tosu. However he could hardly play in the match behind Riki Takasaki from 2000. In 2001, Takasaki left the club and Yamaguchi became a regular goalkeeper. However lost his regular position behind Junnosuke Schneider and he retired end of 2002 season.
| Club performance | League | Cup | League Cup | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Club | League | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | |
| Japan | League | Emperor's Cup | J.League Cup | Total | |||||||
| 1996 | Sanfrecce Hiroshima | J1 League | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 1997 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 1998 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 1999 | Sagan Tosu | J2 League | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | |
| 2000 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | |||
| 2001 | 37 | 0 | 4 | 0 | 0 | 0 | 41 | 0 | |||
| 2002 | 18 | 0 | 0 | 0 | colspan="2" | - | 18 | 0 | |||
| Total | 57 | 0 | 4 | 0 | 0 | 0 | 61 | 0 | |||