Umizaru(海猿, lit. Sea Monkeys) is a manga series by Shūhō Satō which was serialized by Shogakukan in Weekly Young Sunday from 1998 to 2001. Yōichi Komori is credited with the original idea for the series, and he also did the research to make the series more authentic. The manga has been adapted into two NHK high-definition specials, two films, and one drama series.