Yokomizo Seishi was a famous detective novelist in Showa. His works were many,especially he created mystery novels. As we knew, Kindaichi Series were his representativeworks, such as Yattsu Hakamura, Honjin Satsujin Jiken, Gokumon Shima, Akuma Ga KiriteFue Wo Fuku.During reading Kindaichi Series, I was interested in Yattsu Hakamura.The narrative methods of this novel was different from his other novels.Most of KindaichiSeries were writen with third-person,but Yattsu Hakamura was writen withfirst-person.And,what is connection between the social problem in Yattsu Hakamura an Japanin showa.We can understand Yokomizo Seishi and mytery novels much better by reseachingYattsu Hakamura.The reseach about Yokomizo Seishi and his mytery novels has not gotten greatachievements in our country at present, most of which are about works criticism and writercriticism.There are few of people trying to analyse Yokomizo Seishi’s works with narratology.My thesis was based on narratology and analyse the narrative methods of YattsuHakamura person, perspectives of characters and features of narrative,trying a new way toread and understand Yokomizo Seishi’s detective novels.The perface was about introducing Yokomizo Seishi and his detective novels as well asnarratology. The first chapter explored the first-person narration. The second chapter exploredthe perspectives of characters.And the third chapter explored the analysis of YattsuHakamura’s narrative features from carnival, irony and metaphor. A conclusion wasdrew in final chapter.