, also known was , was a Japanese poet and monk of the late Heian period.
Along with Izumi Shikibu, Nà Âin is one of "Thirty-six Medieval Poetry Immortals" of waka poetry selected by (1107âÂÂ1165).
NÃ Âin authored of the Gengenshu and NÃ Âin Utamakura.
One of his poems is anthologized in the Ogura Hyakunin Isshu: