Quick answer — Hiroshi Yakou worked on Kaguya-sama: Love is War -Ultra Romantic- "Yu Ishigami Wants to Chat" (Chief Animation Director), xxxHOLiC (2nd Key Animation), Jormungand (Key Animation) and 16 more anime.
Hiroshi Yakou worked on Kaguya-sama: Love is War -Ultra Romantic- "Yu Ishigami Wants to Chat" (Chief Animation Director), xxxHOLiC (2nd Key Animation), Jormungand (Key Animation), Yu-Gi-Oh! 5D's (Key Animation), Yumeiro Patissiere SP Professional (Key Animation), Naruto Shippuden the Movie: The Lost Tower (Key Animation), Shakugan no Shana: The Movie (Assistant Animation Director), Waiting in the Summer (Prop Design) and 11 more.