Quick answer — Yashichiro Takahashi worked on K: RETURN OF KINGS (Series Composition), Shakugan no Shana: Season II (Original Creator), Shakugan no Shana: Season III (Original Creator) and 5 more anime.
Yashichiro Takahashi worked on K: RETURN OF KINGS (Series Composition), Shakugan no Shana: Season II (Original Creator), Shakugan no Shana: Season III (Original Creator), Shakugan no Shana S (Original Creator), Shakugan no Shana: The Movie (Original Creator), Shakugan no Shana (Original Creator), Atelier Ryza: Ever Darkness & the Secret Hideout The Animation (Series Composition), Shakugan no Shana: Koi to Onsen no Kougai Gakushuu! (Original Creator).
