Genzaburou Karamatsu

Genzaburō Karamatsu (唐松 源三郎, Karamatsu Genzaburō) is the principal of Kaimei High School. Manga Debut: Chapter 25 (Gachinko Vivage Battle) Anime Debut: Episode 16 (Kaimei Rock Festival) (Source: Sket Dance Wikia)