Shōnin 證忍, Kamakura-period Japanese Pure Land monk active in the second half of the thirteenth century; signs himself “Gonjō Gutoku Shōnin” 欣淨愚禿證忍 (“the Pure-Land-Seeking, Ignorant-and-Tonsured Shōnin”) in the colophon of his only surviving work. Precise lifedates are unknown; DILA Authority A001906 records only his authorship of T2208B.
Shōnin identifies himself as a junior monk of Kuhonji-Hokuji 郊北九品寺 (“Kuhonji north of the [Kyoto] suburbs”) — almost certainly the Kuhonji 九品寺 founded by Chōsai 長西 in northern Kyoto, eponym of the Kuhonji-ryū 九品寺流, one of the four streams (jōdo shiryū 浄土四流) of early Jōdoshū alongside Shōkū’s Seizan, Benchō’s Chinzei, and Ryūkan’s Chōrakuji-gi. His extant work, KR6f0079 Kangyō-gi kemmon gutōshō 觀經義賢問愚答鈔, completed Kōan 8 (1285), engages in polemic with both Seizan Dōkyō Shōnin 西山道教上人 (i.e. 顯意 Kenni of the Saizan-Fukakusa line) and Ryōa Shōnin 了阿上人, responding to a list of 120 doubt-points (疑端) raised against Shàndǎo’s Guānjīng shū. The polemical setting situates him doctrinally in opposition to the Saizan reading of Shōkū but otherwise his exact school affiliation is not directly attested; his Kuhonji base suggests the Kuhonji-ryū. Other works are not located.