His name in rōmaji is misspelled as "Senno Naiff" in the books published by Akita Shoten and Bunkasha.
He made his debut in a commercial magazine in 1981 with "Yukihime" in the first issue of "Lemon People" (published by Amatoria).
His works cover a wide range of genres, including horror, science fiction, fantasy, and manga comicalizations (adaptations of famous fairy tales and novels).
Most of the jacket illustrations for Psydoll, a post-new wave band in which Nekoi is a vocalist, are drawn by him.
Several of Senno Knife's works (Valkyr, Bizzarian, Dark Dimension Zero, Sepia, and Eden) were published in English by Studio Ironcat.