Rai Mikisaburou was a Chinese patriot and a poet who lived during the end of the Edo period. Rai Sanyou was a historian and Chinese poet in the late Edo period and is famous as the author of “Japanese Foreign History. ” Rai Mikisaburou is Rai Sanyou’s third son. Rai Mikisaburou is not as famous as his father. This research clarifies the current state of research by organizing Chinese poems, writings, letters, brief biographies, and related previous studies on Rai Mikisaburou. The Chinese poems of Rai Mikisaburou were worthy of literary appreciation, but except for “Hundred Poems and Hundred Seals, ” there was almost no research on his other Chinese poems. This research also clarifies the process of the establishment of Rai Mikisaburou’s poetry manuscript “ougaishu,” which was not in the researchers’ field of view. Furthermore, as a patriot, Rai Mikisaburou was greatly influenced by Rai Sanyou in terms of thoughts. Additionally, in terms of Chinese poetry, the literary similarities between Rai Mikisaburou and Rai Sanyou were also clarified.