Taiyo Koga
| Personal information | |||
|---|---|---|---|
| Full name | Taiyo Koga | ||
| Date of birth | October 28, 1998 | ||
| Place of birth | Niigata, Japan | ||
| Height | 1.82 m (5 ft 11+1⁄2 in) | ||
| Position(s) | Centre back | ||
| Team information | |||
Current team  | Kashiwa Reysol | ||
| Number | 4 | ||
| Youth career | |||
| –2007 | Maihama FC Falcons | ||
| 2008–2016 | Kashiwa Reysol | ||
| Senior career* | |||
| Years | Team | Apps | (Gls) | 
| 2017– | Kashiwa Reysol | 189 | (3) | 
| 2018 | → Avispa Fukuoka (loan) | 21 | (0) | 
| International career‡ | |||
| 2021 | Japan U23 | 2 | (0) | 
| 2019– | Japan | 1 | (0) | 
| 
*Club domestic league appearances and goals, correct as of 5 November 2022 ‡ National team caps and goals, correct as of 23:21, 7 July 2021 (UTC)  | |||
Taiyo Koga (古賀 太陽, Koga Taiyo; born October 28, 1998) is a Japanese football player. He plays for Kashiwa Reysol.