| Kōichi Hashimoto | |
| Native Name: | 橋本 晃一 |
| Native Name Lang: | ja |
| Birth Name: | Yōichi Mitsuhashi |
| Birth Date: | 12 January 1953 |
| Birth Place: | Chiba Prefecture, Japan |
| Education: | Senshu University |
| Agent: | Umikaze |
is a Japanese actor, voice actor and narrator from Chiba Prefecture, Japan. He is currently affiliated with Umikaze, though he has been attached to Arts Vision, Aksent, Ken Production, and Art 7 in the past.
Unknown date