Ōsawa
# Ōsawa

Ōsawa, Osawa or Oosawa (written: 大沢 or 大澤 lit. "big swamp") is a Japanese surname. Notable people with the surname include:

* Chiho Osawa (大澤 ちほ, born 1992), Japanese ice hockey player
* Eiji Osawa (born 1935), Japanese chemist
* Itsumi Osawa (born 1966), Japanese actress, writer and singer
* Kenji Osawa (born 1976), Japanese mixed martial artist
* Kisaburo Osawa (1910–1991), Japanese aikidoka
* Masaaki Ōsawa (born 1946), Japanese politician and governor of Gunma Prefecture
* Masayo Ōsawa (1913–1945), Japanese diver
* Masayuki Osawa (大沢 正行, born 1946), Japanese swimmer
* Reiko Ōsawa (born 1915), Japanese diver
* Shigeki Osawa (born 1986), Japanese mixed martial artist
* Shinichi Osawa (born 1967), Japanese musician better known as Mondo Grosso
* Takao Osawa (born 1968), Japanese actor
