
Quick answer — Tomohiro Kawahara worked on Symphogear G (Mechanical Design), Symphogear GX (Mechanical Design), Buddy Complex (Mechanical Design) and 7 more anime.
Tomohiro Kawahara worked on Symphogear G (Mechanical Design), Symphogear GX (Mechanical Design), Buddy Complex (Mechanical Design), Dogs: Bullets & Carnage (Prop Design), Jack-of-All-Trades, Party of None (CG Supervisor), Origin: Spirits of the Past (Design), Freezing (Mechanical Design), Yatterman Night (Mechanical Design) and 2 more.