Oshima Idea graduated from the Department of Design at Tokyo Zokei University. He has worked mainly on graphics for movies and books, as well as art direction for art exhibitions. Oshima Idea's major works include book designs for Banana Yoshimoto's Tori-tachi (Birds) and Sazae-san Ehon (The Illustrated Book of Sazae-san), and the exhibition design for "Shuntaro Tanikawa." He is also in charge of the artwork of artist KIRINJI.