Quick answer — Takahiro Sakai worked on Yuki Yuna is a Hero: The Washio Sumi Chapter (Character Design), Yuki Yuna is a Hero: The Great Mankai Chapter (Character Design), Yuki Yuna is a Hero (Character Design) and 5 more anime.
Takahiro Sakai worked on Yuki Yuna is a Hero: The Washio Sumi Chapter (Character Design), Yuki Yuna is a Hero: The Great Mankai Chapter (Character Design), Yuki Yuna is a Hero (Character Design), Stardust Telepath (Character Design), Ms. vampire who lives in my neighborhood. (Character Design), Reborn as a Vending Machine, I Now Wander the Dungeon Season 3 (Character Design), Reborn as a Vending Machine, I Now Wander the Dungeon Season 2 (Character Design), Reborn as a Vending Machine, I Now Wander the Dungeon (Character Design).