• English / United States: Teacher Takashima
• Japanese / Japan: タカシマ先生
• Japanese (Romanized) / Japan: Takashima-sensei
• Japanese (TL) / Japan: Teacher Takashima

Professor Takashima is an employee of the Pokémon Card Game company in Japan and promotes the card game. He has appeared numerous times on Pokémon Sunday (ポケモン☆サンデー) during the Pokémon Game Arena segment to introduce new expansion sets and explain the cards. He has also appeared during some of the live action large card battles that ROBERT have enacted on the show.