| Native Name: | 小島弥太郎 |
| Kojima Yatarō | |
| Native Name Lang: | jp |
| Residence: | Japan |
| Other Names: | Kojima Sadaoki; Kazutoshi, Katsutoshi, alias: Kyonosuke, His name: Oni Kojima |
| Birth Name: | Yatarō |
| Birth Date: | 1522 |
| Birth Place: | Harima Province or Mimasaka Province, Japan |
| Death Date: | (aged 60–61) |
| Death Place: | Tenjinyama of Tochio Ohno cho, Nagaoka-shi, Niigata Prefecture. |
| Death Cause: | Battle |
| Martial Art: | Kenjutsu |
| Teacher: | Kenshin Uesugi |
was a Japanese samurai of the Sengoku period, who served the Uesugi clan of Echigo Province. He was one of Uesugi Kenshin's leading generals. His ferocity in combat gave rise to his nickname, .[1]
He was also sometimes called "The Ogre" because his helmet had an image of a grinning oni, a mythical creature which has been translated as ogre or demon. His weapon was a kanabō, a weapon associated with ogres, and thus adding further to his reputation.