Hitomi Satouis an employee of Game Freak whose first credited project was Pokémon Crystal. Originally working only in game design, Satō has, since at least Pokémon FireRed and LeafGreen, helped write Game Freak's games' scenarios and, from at least Pokémon Emerald on, contributed to Game Freak's music as a composer.
Not to be confused with another Hitomi Satou who is a voice actress.