Nishiyama, the lay priest of ［西山入道］ (n.d.) ( Nishiyama-nyūdō): A follower of Nichiren (1222–1282) who lived in Nishiyama Village in Fuji District of Suruga Province, Japan. Nichiren addressed six extant letters to him, including Three Tripitaka Masters Pray for Rain. According to one account, Nishiyama was a relative of Ōuchi Tasaburō Yasukiyo, the steward of Nishiyama Village, but another view identifies him as the lay priest Yui, Nikkō’s maternal grandfather, who lived in Kawai, Fuji District.