Susumu Nakanishi is a scholar of Japanese literature, particularly of the Man'yōshū. He earned his Doctor of Literature degree from the University of Tokyo (UTokyo) in 1962.

The Man'yōshū is the oldest extant collection of Japanese waka, compiled sometime after AD 759 during the Nara period. The anthology is one of the most revered of Japan's poetic compilations. The compiler, or the last in a series of compilers, is today widely believed to be Ōtomo no Yakamochi, although numerous other theories have been proposed. The chronologically last datable poem in the collection is from AD 759 (No. 4516). It contains many poems from a much earlier period, with the bulk of the collection representing the period between AD 600 and 759. The precise significance of the title is not known with certainty.