, was a Japanese Buddhist priest and poet. Little is known of his life except that his secular name was Kasa no Ason Maro. While serving at a temple in the north of Kyūshū, he was a member of Ōtomo no Tabito's literary coterie. His few surviving pieces are collected in the Man'yōshū.
Mansei is famous for the following waka poem from the Manyoshu: Yononaka-wo Nani-ni Tatohemu Asa-biraki Kogi-inishi Fune-no Ato-naki-gotoshi which means All are to disappear, just as the morning boat wake does.
References
Further reading Roy Andrew Miller, The Lost Poetic Sequence of the Priest Manzei Steven D. Carter, Traditional Japanese Poetry: An Anthology, Stanford U. 1993