Quick answer — Ryou Kawasaki worked on To Your Eternity (Music), To Your Eternity Season 2 (Music), Romantic Killer (Music) and 11 more anime.
Ryou Kawasaki worked on To Your Eternity (Music), To Your Eternity Season 2 (Music), Romantic Killer (Music), To Your Eternity Season 3 (Music), Tying the Knot with an Amagami Sister (Music), Thermae Romae Novae (Theme Song Arrangement), Altair: A Record of Battles (Music), Reikenzan: Hoshikuzu-tachi no Utage (Music) and 6 more.