
Quick answer — Mitsurou Kubo worked on Yuri on Ice Side Story: Welcome to The Madness (Original Creator), Yuuri!!! on ICE The Movie: ICE ADOLESCENCE (Original Creator), Yuri!!! on ICE (Original Creator).
Mitsurou Kubo worked on Yuri on Ice Side Story: Welcome to The Madness (Original Creator), Yuuri!!! on ICE The Movie: ICE ADOLESCENCE (Original Creator), Yuri!!! on ICE (Original Creator).