Buzen Nichigen (è±ÂÃ¥ÂÂæÂ¥æºÂ, before 1263 â 1315) was a disciple of Nichiren who converted along with the rest of the Tendai temple Jisso-ji (實ç¸寺) to Nichiren Buddhism in 1270. Nichiren's letter Jissoji gosho (實ç¸寺御æÂ¸, 1278) is addressed to him. Later, he joined Nichiren on Mount Minobu, and founded several temples after Nichiren's death.