Kenji Ohtsuki (also romanized as Kenji Ootsuki, or Kenji Ōtsuki) is a Japanese musician, writer, and singer. He is best known as the main vocalist of the band Kinniku Shōjo Tai (King-Show), which he formed with his classmate Yūichirō Uchida. After the disbandment of King-Show in 1999, he formed the band Tokusatsu, that also featured the Coaltar of the Deepers guitarrist and leader Narasaki. King-Show reformed in 2006.

Aside from his music career, he has also worked as a literary writer and essayist, with some of his works being adapted to film, and even winning the Japanese sci-fi Seiun Award.