
Quick answer — Kazunari Sengoku worked on Hajime no Ippo: The Fighting! - Mashiba vs Kimura (Music Production), Ouran High School Host Club (Music Production), Hajime no Ippo: The Fighting! - Champion Road (Music Production) and 4 more anime.
Kazunari Sengoku worked on Hajime no Ippo: The Fighting! - Mashiba vs Kimura (Music Production), Ouran High School Host Club (Music Production), Hajime no Ippo: The Fighting! - Champion Road (Music Production), MASTER Keaton (Music Production), The Gokusen (Music Production), EDENS ZERO (Music Producer), Air Master (Music Producer).