Kotomi was born in Hiroshima, Japan. She started her training in 2001 under the direction of Ms. Akemi Kouke and continued her studies, under Mrs. Mika Tamaru at the International Ballet Academy. Her teachers have included Justin Meissner, Ricardo Cervera, Shigeru Aota, Laura Morera, and Steven McRae.
Her honors and awards include 2014 Semi-Finalist at the Genee International Ballet Competition, All Nippon Classic Ballet Competition finalist in 2012 and 2015.
She has completed the Royal Academy of Dancing grade awards through Advanced 2.
Her classical repertoire includes the title role from Raymonda, and Dance of the Reed Flute, and Snow Queen from Nutcracker. Kotomi performed at the Japan Festival and the Sydney Opera House. This is her first season with Mystic Ballet 2.