Long-time score composer of the Pokemon games, Masuda has worked with developer Game Freak for over twenty-five years. Since the original games for the Game Boy (Red and Blue Version), Masuda has composed music for nearly every core Pokemon title to date. In the original games, each town was given its own musical theme.
Many of these tunes have been revered for effectively reflecting each town's tone, most especially the eerie theme for Lavender Town. While drawing influence from modern-era classical composers like Dmitri Shostakovich and Igor Stravinsky, Masuda has often looked to the divine music of the Super Mario series as a model for video game music.