Artist, mangaka. The author of "Kuroneko no Ekichou-san":[http://www.mangaupdates.com/series.html?id=99496].

Japanese name: 山口 悠 (Yamaguchi Yuu)
Old name: ヤマグチ タカシ (Yamaguchi Takashi)
Circle & site name: ClearBook
Adult page name: NuclearBook
yamaguchi yuu