| Kan Ishii | |
| Native Name: | 石井 歓 |
| Birth Date: | 1927 11, df=yes |
| Birth Place: | Tokyo, Japan |
| Death Place: | Yokohama, Japan |
| Native Name Lang: | ja |
| Occupation: | Composer |
| Father: | Baku Ishii |
| Relations: | Maki Ishii (brother) |
was a Japanese composer. His father, Baku Ishii, was a prominent Japanese ballet dancer, and his brother Maki Ishii was also a composer. His Symphonia Ainu won a prize at the 1958 Art Festival, inspiring him to do further work inspired by nationalist primitivism. His musical style appeals directly to the emotions, and shows the influence of Carl Orff. In addition to orchestral and vocal music, he has written extensively for the stage, including 6 operas, 3 ballets and 9 film scores, including the 1962 science-fiction film Gorath. Ishii accepted a position as professor at Shōwa College of Music in 1986.