He has worked for companies such as Sega, Enix, Climax Entertainment, and Game Arts.
Takenouchi studied music at the Tokyo University of the Arts, where he and fellow composer Hayato Matsuo were classmates.
Takenouchi's compositional approach often encompasses elements of progressive rock, jazz fusion, and symphonic, frequently making use of odd time signatures, virtuosic musical lines, syncopation and dissonance.
He cited King Crimson, Yes, Frank Zappa, and Emerson, Lake & Palmer as some of his influences.
In addition to his work on video game soundtracks, Takenouchi also composed music for some of the early releases on Shinji Hosoe's Troubadour record label.