| Mitsuki Koga | |
| Native Name: | 虎牙光揮 |
| Native Name Lang: | ja |
| Birth Date: | 16 January 1975 |
| Birth Place: | Aizuwakamatsu, Japan |
| Occupation: | Actor |
, is a Japanese actor who is known to be featured in films that involve much martial arts. He trained in Muay Thai, Karate and Boxing before starting his acting career.
Best known for his portrayals as Kyosuke Akiba in , Shinjiro Hayashida from Cromartie High - The Movie, and Tetsuki Yamato/Kamen Rider Ketaros in the 2006 Tokusatsu movie, .
He was also featured as a main character in the film adaptation of Futaro Yamada's novel Koga Ninpocho, , And was a part of the stunt performers for The Last Samurai. He also recently made a minor/cameo role in as a Yakuza bodyguard.