| Taiyo Koga 古賀 太陽 | |
| Fullname: | Taiyo Koga |
| Birth Date: | 28 October 1998 |
| Birth Place: | Niigata, Japan |
| Position: | Centre back |
| Currentclub: | Kashiwa Reysol |
| Clubnumber: | 4 |
| Youthyears1: | –2007 |
| Youthclubs1: | Maihama FC Falcons |
| Youthyears2: | 2008–2016 |
| Youthclubs2: | Kashiwa Reysol |
| Years1: | 2017– |
| Caps1: | 189 |
| Goals1: | 3 |
| Years2: | 2018 |
| Clubs2: | → Avispa Fukuoka (loan) |
| Caps2: | 21 |
| Goals2: | 0 |
| Nationalyears1: | 2021 |
| Nationalteam1: | Japan U23 |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2019– |
| Nationalteam2: | Japan |
| Nationalcaps2: | 1 |
| Nationalgoals2: | 0 |
| Club-Update: | 5 November 2022 |
| Nationalteam-Update: | 23:21, 7 July 2021 (UTC) |
is a Japanese football player and professional football coach. He plays and assistant coach for J1 League club Kashiwa Reysol.
Taiyo Koga joined J1 League club Kashiwa Reysol in 2017.
Updated to end of 2018 season.[1]
| Club performance | League | Cup | League Cup | Continental | Total | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Club | League | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | |
| Japan | League | Emperor's Cup | J. League Cup | AFC | Total | ||||||||
| 2017 | Kashiwa Reysol | J1 League | 9 | 0 | 2 | 1 | 5 | 0 | colspan=2 | - | 16 | 1 | |
| 2018 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 0 | |||
| 2018 | Avispa Fukuoka | J2 League | 21 | 0 | 0 | 0 | colspan=2 | - | colspan=2 | - | 21 | 0 | |
| Total | 30 | 0 | 2 | 1 | 5 | 0 | 2 | 0 | 39 | 1 | |||
| Japan national team | |||
|---|---|---|---|
| Year | Apps | Goals | |
| 2019 | 1 | 0 | |
| Total | 1 | 0 | |