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Our catalog credits Ryouichi Koga, a mangaka, on five titles. Their listed hometown is Yasucho, Japan.
Production credits include story & art (4) and original creator.
Our catalog lists five credits, including Ninja Nonsense, Osaka Banpaku, and Ninin ga Shinobuden.
Their hometown is listed as Yasucho, Japan.
Browse titles and the roles they contributed.
