
Quick answer — Hiroshi Ookubo worked on Outlaw Star (Design Works), The Masterful Cat is Depressed Again Today (Main Animator), K: MISSING KINGS (Mechanical Design) and 7 more anime.
Hiroshi Ookubo worked on Outlaw Star (Design Works), The Masterful Cat is Depressed Again Today (Main Animator), K: MISSING KINGS (Mechanical Design), K: RETURN OF KINGS (Mechanical Design), K (Mechanical Design), The Girl I Like Forgot Her Glasses (Main Animator), The Exiled Heavy Knight Knows How to Game the System (Main Animator), Coppelion (Mechanical Design) and 2 more.