
Quick answer — Shinya Umemura worked on Record of Ragnarok III (Original Story), Record of Ragnarok II Part 2 (Original Story), Record of Ragnarok II (Original Story) and 1 more anime.
Shinya Umemura worked on Record of Ragnarok III (Original Story), Record of Ragnarok II Part 2 (Original Story), Record of Ragnarok II (Original Story), Record of Ragnarok (Original Story).