
Quick answer — Ryo Kuratomi voices Oushou in Tonari no Seki-kun: The Master of Killing Time, Nozaki in Level E.
Ryo Kuratomi voices Oushou (Tonari no Seki-kun: The Master of Killing Time), Nozaki (Level E).
Oushou is voiced in Japanese by Ryo Kuratomi.