
Quick answer — Hideki Hamasu worked on Howl‘s Moving Castle (Key Animation), Perfect Blue (Character Design), Rurouni Kenshin (Character Design) and 4 more anime.
Hideki Hamasu worked on Howl‘s Moving Castle (Key Animation), Perfect Blue (Character Design), Rurouni Kenshin (Character Design), The Boy and the Beast (Key Animation), The Secret World of Arrietty (Key Animation), Mary and The Witch's Flower (Key Animation), Dragon Ball Z: Super Android 13! (Key Animation).