Tomojirō Ikenouchi (池内 友次郎 Ikenouchi Tomojirō, October 21, 1906 - March 9, 1991) was a Japanese composer of contemporary classical music and professor born in Tokyo, Japan. The son of a haiku poet, Ikenouchi traveled to Paris in 1927, where he studied composition with Henri Büsser and piano with Lazare Levy. His music is influenced by French Impressionist music. He returned to Japan in 1933.
Ikenouchi taught at the Tokyo National University of Fine Arts and Music beginning in 1947. His notable students include Isang Yun, Toshi Ichiyanagi, Toshiro Mayuzumi, Maki Ishii, Shin-ichiro Ikebe, Makoto Shinohara, Akira Miyoshi, Akio Yashiro, Roh Ogura, Kōhei Tanaka, Teizo Matsumura, and Ryohei Hirose. Along with several of his students, he formed the Shinshin Kai group in 1955.
His works are published by Ongaku-no-Tomo Sha.