Tonegawa may refer to:
History
- Battle of Tonegawa, a Japanese battle
Science
- Susumu Tonegawa (born 1939), Japanese scientist
- 6927 Tonegawa (1994 TE1), a minor planet discovered on October 2, 1994 Kitami Observatory, Japan
Other
- Tone River (利根川 Tone-gawa), a river in the Kantō region of Japan
- Yukio Tonegawa, a character in the Japanese manga series, Kaiji
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