Hisayuki Toriumi (鳥海 永行, Toriumi Hisayuki, July 9, 1941 – January 23, 2009), sometimes credited as Eikō Toriumi, was a Japanese animation director, storyboardist, screenwriter, and novelist. He is best known for directing the TV show Science Ninja Team Gatchaman and also credited for his contributions to several other anime series.He is known to Japanese fans for his TV series The Wonderful Adventures of Nils and Shima Shima Tora no Shimajirō and to international fans for his work in Area 88, Dallos, The Mysterious Cities of Gold, and Tekkaman: The Space Knight.