| Koki Harada | |
| Birth Date: | 6 August 2000 |
| Birth Place: | Saitama Prefecture, Japan |
| Height: | 1.69m |
| Position: | Midfielder |
| Currentclub: | ReinMeer Aomori |
| Youthyears1: | 2016–2018 |
| Youthclubs1: | Shohei High School |
| Youthyears2: | 2019–2021 |
| Youthclubs2: | Kawasaki Frontale |
| Years1: | 2021–2023 |
| Clubs1: | Kawasaki Frontale |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 2021 |
| Clubs2: | → Gainare Tottori (loan) |
| Caps2: | 16 |
| Goals2: | 0 |
| Years3: | 2022–2023 |
| Clubs3: | → Nagano Parceiro (loan) |
| Caps3: | 25 |
| Goals3: | 1 |
| Years4: | 2024– |
| Clubs4: | ReinMeer Aomori |
| Club-Update: | 17:49, 1 August 2024 (UTC) |
Koki Harada (born 6 August 2000) is a Japanese professional footballer who plays as a midfielder for ReinMeer Aomori.
Born in Saitama Prefecture, Harada began playing with Shohei High School,[1] before signing for Kawasaki Frontale in 2019.[2] After loan spells with Gainare Tottori and Nagano Parceiro, he left Frontale at the end of the 2023 season.[3] He signed with ReinMeer Aomori in February 2024.[4]