Quick answer — Shigeru Saitou worked on Violet Evergarden: Special (Music Producer), Hidamari Sketch x Hoshimittsu (Music Producer), Sound! Euphonium The Movie — May the melody reach you! — (Music Producer) and 10 more anime.
Shigeru Saitou worked on Violet Evergarden: Special (Music Producer), Hidamari Sketch x Hoshimittsu (Music Producer), Sound! Euphonium The Movie — May the melody reach you! — (Music Producer), Sound! Euphonium: The Movie - Our Promise: A Brand New Day (Music Producer), The Melancholy of Haruhi Suzumiya (Music Producer), A Ninja and an Assassin Under One Roof (Music Producer), D4DJ First Mix (Music Producer), Sound! Euphonium The Movie: Welcome to the Kitauji High School Concert Band (Music Producer) and 5 more.