Abstract: RAI Sanyo, a Japanese Sinologist in the late Edo period, was known as "Japanese SU Shi". RAI's acceptance of SU Shi's articles was widely found in his literary criticism and creation, and centered on historical and policy argumentation. As an article critic, RAI analyzed and summarized SU Shi's five organizations of writing, pointing out that there are two sides including creating and following the organizations. RAI's comments closely follow the vein of the Southern Song Dynasty's literary criticism, and is also one of the manifestations of the development of the practical Japanese literary criticism from lexicography, random talk to guideline book. As a statecraft ideologist, RAI's Nihon Gaishi was influenced by SU Shi's historical argumentation and attached importance to learning from the past, while Tsugi was deeply influenced by SU Shi's policy argumentation from layout to political thoughts. RAI's praise of SU Shi's historical and policy argumentation conforms to the practical thought of pursuing the transformation of reality in the late Edo period, and also contributes to the popularity of Dongpo Policy. RAI Sanyo became an iconic figure, indicating the acceptance of SU Shi 's articles during the Edo period turns to historical and policy argumentation and their application to the world.