
Quick answer — Hiromu Kumamoto worked on Theatre of Darkness: Yamishibai (Script), KAGEWANI (Script), Theatre of Darkness: Yamishibai 5 (Assistant Director) and 2 more anime.
Hiromu Kumamoto worked on Theatre of Darkness: Yamishibai (Script), KAGEWANI (Script), Theatre of Darkness: Yamishibai 5 (Assistant Director), Theatre of Darkness: Yamishibai 4 (Script), KOWABON (Script).