
Quick answer — Tsutomu Kasai worked on The Slime Diaries (Assistant Director), Shonen Maid (Animation Producer), Busou Shinki: Armored War Goddess (Animation Producer).
Tsutomu Kasai worked on The Slime Diaries (Assistant Director), Shonen Maid (Animation Producer), Busou Shinki: Armored War Goddess (Animation Producer).