Mumon Gensen

Mumon Gensen (Japanese: 無文元選, March 22, 1323 - May 7, 1390) was a Japanese Zen priest, believed as an illegitimate son of Emperor Go-Daigo. In 1340, the next year of Go-Daigo death, Gensen became a priest at Kennin-ji, Kyoto, a major Rinzai-zen affiliated temple. He went to China ruled by Yuan dynasty to study Zen much further, and after his return to Japan, founded Hōkō-ji in Tōtōmi Province, now Shizuoka Prefecture.