
Quick answer — Kouhei Hashimoto worked on Log Horizon (Key Animation), Fairy Tail (Key Animation), Hell Girl (Key Animation) and 12 more anime.
Kouhei Hashimoto worked on Log Horizon (Key Animation), Fairy Tail (Key Animation), Hell Girl (Key Animation), Fairy Tail: Phoenix Priestess (Key Animation), Guin Saga (Key Animation), Pretty Guardian Sailor Moon Crystal: Seasons 1-2 (2nd Key Animation), Buddy Complex (Key Animation), Tokyo Majin Season 2 (Assistant Animation Director) and 7 more.