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Prince Masanari (雅成親王, Masanari shinnō; 1200–1255) was a waka poet and Japanese nobleman active in the early Kamakura period. He was a son of Emperor Go-Toba.
Masanari is designated as a member of the New Thirty-Six Immortals of Poetry (新三十六歌仙, Shinsanjūrokkasen).