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.
In primary school, Ohtsuki and classmate Yūichirō Uchida wanted to become manga artists, but they soon started to discover the big names of prog rock like King Crimson and Pink Floyd; Japanese new wave bands like YMO, Hikashu and P-Model; and the Japanese punk rock of Kenji Endo, Zunou Keisatsu, Jagatara, The Stalin and INU.
Also, he formed the band "Densha" with musicians who had helped him on his solo efforts, like Ishizuka BERA Norihiro (from qyb, Kinniku Shoujo Tai and a support member for SOFT BALLET), Obata Pump (from Scanch, and Kenji Sato (from MARCHOSIAS VAMP).
Even nowadays, he uses the side-project "Ohtsuki Kenjis" (of which he is the only fixed member) to create music for anime and tokusatsu movies, for special events and shows or to play jazz and acoustic sets.
Since 1998, he regularly hosts an event in the Shinjuku Loft Plus One called "Nohohon Gakkou" ("Nonchalant School"), to which he invites guests from the Japanese subculture to talk.
Kinniku Shōjo Tai's had dissolved partly because of bad feelings amongst some of the members, but in July 2006 they held an event called "reconciliation" and reformed.
Ever since Kinniku Shōjo Tai's come-back in 2007 he has stopped writing novels, but his serialized essays and talks are still active.