Tonegawa may refer to:
History Battle of Tonegawa, a Japanese battle
Science Susumu Tonegawa (1939–2026), 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