She is the founding member of JAM Project, and is best known for providing the voice of Satoshi (Ash Ketchum), the main character of the Pokémon anime series. As such, Matsumoto has taken on roles as young boys. Matsumoto also performs the songs for many of the openings for the Japanese Pokémon anime.
This voice acting career includes 2 credited roles — among them Musashi in Brave Fencer Musashi — across animated and gaming titles.
