, better known as , was Japanese waka poet and Buddhist priest. In the poetry anthology Kokin Wakashà «, he is listed as one of the six notable waka poets and one of the thirty-six immortals of poetry.
Munesada was the eighth son of Dainagon , who was a son of Emperor Kanmu, relegated to civilian life. He began his career as a courtier, and was later appointed to the position of ' to Emperor Ninmyà Â. In 849 he was raised to the . After Emperor Nimmyà  died in 850, Munesada became a monk due to his grief, taking the religious name Henjà  (literally âÂÂUniversally IlluminatedâÂÂ). He was a priest of the Tendai school.
In 877 Munesada founded in Yamashina, in the southeast part of Kyoto, but continued to be active in court politics. In 869 he was given another temple, , in the north of Kyoto and managed both temples. In 885 he was ranked high priest and was called .
He was rumored to have had a love affair with the famous female poet Ono no Komachi.
Thirty-five of his waka were included in imperial anthologies including Kokin Wakashà «. The preface to Ki no Tsurayuki criticized him: "he knows how to construct waka, but there is less real emotion. It is like when you see a picture of a woman and it moves your heart".
His son, Sosei, was also a waka poet and a monk.
Henjà  was famous for the following poem from the Hyakunin Isshu: