Kenji Ohtsuki (大槻 ケンヂ, 大槻 賢二, Ōtsuki Kenji; born February 6, 1966 in Nakano, Tokyo) is a Japanese rock musician and Seiun Award-winning writer. His musical career began in the late 1970s. He is the vocalist of Kinniku Shōjo Tai, Tokusatsu, Underground Searchlie and Karate Bakabon. The lyrics of a Kinniku Shōjo Tai's song "Doko e demo Ikeru Kitte" affected the character design of Rei Ayanami, from the popular anime series Neon Genesis Evangelion. He's also performed the theme songs to several anime, including Welcome to the N.H.K., Hellsing and Sayonara Zetsubou Sensei.
Source: “Kenji Ohtsuki”, English Wikipedia (CC BY-SA 4.0), excerpt