| Koki Hasegawa | |
| Fullname: | Koki Hasegawa |
| Birth Date: | 27 April 1999 |
| Birth Place: | Tokyo, Japan |
| Position: | Defender |
| Currentclub: | Giravanz Kitakyushu |
| Clubnumber: | 4 |
| Youthclubs1: | FC Tokyo |
| Years1: | 2017–2022 |
| Clubs1: | FC Tokyo |
| Years2: | 2020–2022 |
| Years3: | 2022– |
| Caps3: | 17 |
| Goals3: | 0 |
| Club-Update: | 5 September 2023 |
is a Japanese football player who currently plays for Giravanz Kitakyushu.