| Masao Oka | |
| Birth Date: | 5 June 1898 |
| Birth Place: | Nagano, Matsumoto |
| Othername: | 岡 正雄 |
| Occupation: | Japanese ethnologist and Japanologist |
was a Japanese ethnologist and Japanologist.[1] Oka is considered the leading figure in the establishment of Japanese ethnology since the 1930's.[2]
He was born in Matsumoto, Nagano Prefecture. He was a graduate of the University of Tokyo and Tohoku University. He served on the faculty of Meiji University, Kanagawa Dental University, Wayo Women's University, Tokyo Metropolitan University and Tokyo University of Foreign Studies.
He died on 15 December 1982 in Tokyo.[3]