Osaki is a type of spirit possession of a fox told about in legends of Japan.

Osaki, Ōsaki or Ohsaki may also refer to:

3626 Ohsaki, a main-belt asteroid Ōsaki, Kagoshima, Japan Ōsaki, Miyagi, Japan Ōsaki, Tokyo, a neighborhood in Shinagawa, Tokyo, Japan Ōsaki (surname), a Japanese surname Ōsaki Station, a railway station in Shinagawa, Tokyo, Japan