abstract:is a Japanese mystery writer, who is a member of Ōsawa Office.大極宮 -大沢オフィス公式ホームページ Three of his novels have been turned into feature films; Mōryō no Hako, which won the 49th Mystery Writers of Japan Award, was also made into an anime TV series, as was Kosetsu Hyaku Monogatari, and his book Loups=Garous was adapted into an anime feature film.