Sami Mansei (沙弥満誓 novice Mansei), flourished circa 720, 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 or Thousand Leaf Collection.