Takeuchi is a Japanese surname. It is common in west-central Japan, and is pronounced Takenouchi (Take-no-uchi) by some bearers. The family claims descent from the legendary hero-statesman Takenouchi-no-Sukune, himself supposedly a descendant of the mythical Emperor Kōgen and a counselor to several other emperors, including Emperor Ōjin. Other families such as the Soga clan also claim Takenouchi-no-Sukune as an ancestor. It can also be written as 竹野内.
