Naoto Ohshima (also Ōshima) is a Japanese artist and former SEGA employee who was the original character designer of Sonic the Hedgehog and Dr. Eggman. Ohshima gained notoriety at Sega for creating characters and playing integral roles in the development of games like Phantasy Star, NiGHTS, and Sonic Adventure. After leaving Sonic Team, he co-founded (and later became president of) an independent game company called Artoon. There he went on to work on such games as Pinobee and Blinx the Time Sweeper.