This dissertation is aimed to investigate the aspects of acceptance and transformation of ancient Japanese mythologies in Ihara Saikaku, a representative popular writer in Edo period. Firstly, the drift of the relationship between Japaneses mythologies and nationalism is considered, and then the manifestation of the ancient mythologies in Asai Ryoi`s 3 cases presented in his Kanazousi 『ukiyomonogatari』, which affected Saikaku`s first Ukiyozoshi titled 『koushokuichidaiotoko』, are nextly done. Following that, I go over 4 cases prsented in Saikaku`s Ukiyozoshi titled 『koushokuichidaiotoko』 and 5 cases in 『nihonneitaikura』 in the same manner. As results, I do not find any manifestation of the notion that has considered Korean peninsular as the other ever since the medieval ages. This can be said that his works might have some clues for a notion which may provide for fostering a good neighborship in East Asia, because they show nothing with the identity idea. Finally, Saikaku`s works, which had represented the metropolitan merchants` cognition, lived in Edo, Osaka, Kyoto, and so forth, do not reveal any clue of the identity idea and manifest a colonized taste of petit bourgeois which makes a caricature with the ancient mythologies.