Takuma Itoh spent his early childhood in Japan before moving to Northern California where he grew up.  His music has been described as "brashly youthful and fresh" (New York Times). Featured amongst one of "100 Composers Under 40" on NPR Music and WQXR, he has been the recipient of such awards and commissions as: the Charles Ives Scholarship from the American Academy of Arts and Letters, Music Alive: New Partnerships grant with the Tucson Symphony, the Barlow Endowment, the ASCAP/CBDNA Frederick Fennell Prize, six ASCAP Morton Gould Young Composer Awards, the Leo Kaplan Award, the American Composers Orchestra Underwood New Music Readings, the New York Youth Symphony First Music, The New York Virtuoso Singers, Maui Arts & Cultural Center, and the Renée B Fisher Foundation. 
Itoh's music has been performed by the Albany Symphony, the Tucson Symphony Orchestra, Alarm Will Sound, the Cabrillo Festival Orchestra, the New York Youth Symphony, Symphony in C, the Silesian Philharmonic Orchestra (Poland), the Shanghai Quartet, the St. Lawrence Quartet, the Cassatt Quartet, the Momenta Quartet, Sara Davis Buechner, Jeffrey Jacob, Joseph Lin, Ignace Jang, Syzygy Ensemble (Australia), H2 Quartet, Kyo-Shin-An Arts, the Music from Copland House, the Varied Trio, Kojiro Umezaki, HUB New Music Ensemble, Duo Yumeno, and Linda Chatterton. In 2015, Itoh scored the music for the short film "Salesi" directed by Garin Nugroho and Vilsoni Hereniko that was featured at the Honolulu Film Festival. 
Itoh has been a fellow at the Mizzou International Composers Festival, Cabrillo Composer Workshop, Wellesley Composers Conference, Copland House CULTIVATE, Pacific Music Festival and the Aspen Music Festival. He holds degrees from Cornell University, University of Michigan, and Rice University. His past teachers include Steven Stucky, Roberto Sierra, William Bolcom, Bright Sheng, Shih-Hui Chen, Anthony Brandt, Pierre Jalbert, and Karim Al-Zand. 
Since 2012, Itoh has been a faculty member at the University of Hawaiʻi at Manoa.