Ninja Nonsense: The Legend of Shinobu(ニニンがシノブ伝Ninin ga Shinobuden) is an anime and manga series by Ryoichi Koga(古賀 亮一Koga Ryōichi). The series subtitle is "The Nonsense Kunoichi Fiction". The anime has been licensed and released in North America by The Right Stuf International under the title Ninja Nonsense: The Legend of Shinobu. The translated manga was released by Infinity Studios under the title Ninin Ga Shinobuden. The original title of the series is based on a pun. In the Japanese numerical system, ni is two, and shi is four. Ni (2) x ni (2) = shi (4), therefore Ni-ni-n ga Shi-nobuden.