Seikaku 聖覺 (Nin’an 2 / 1167 – Bun’ryaku 2 / 11 / 9 = 1235-12-23), late-Heian → early-Kamakura Tendai monk and master of shōdō / jōdō sermon-preaching (唱導), and a major lay-doctrinal disciple of 源空 Hōnen. Common appellation Agui Seikaku 安居院聖覺, after the Agui sub-temple of Eishin-an 慧心庵 in northern Kyoto, the family cloister of his lineage. Father: Chōken 澄憲 (1126–1203), the founder of the Agui shōdōryū 安居院唱導流 — the lineage of shōdō (preaching) art that became the dominant medieval Japanese-Buddhist style.
Initially trained on Hieizan in Tendai; eminent as a Tendai-school preacher by his thirties. Around the time of 源空 Hōnen’s founding of the Jōdoshū doctrine (1175 onward), Seikaku came under Hōnen’s influence; he is named among Hōnen’s “five disciples on the Senchakushū” and was the Sangha-witness for several of Hōnen’s most important formal compositions. He retained his Tendai institutional position throughout his life, never fully joining the Jōdoshū institution, but his doctrinal sympathies — and his major work KR6t0386 Yui-shin-shō 唯信抄 (“Notes on Faith-Alone”, composed Kenpō 1 / 1213) — place him doctrinally in the Pure-Land camp. The Yui-shin-shō was the principal devotional text that Shinran 親鸞 himself copied, transmitted, and glossed in his own Yui-shin-shō mon’i 唯信抄文意 KR6t0368 — making Seikaku one of the principal bridge-figures between Hōnen’s exclusive-nenbutsu doctrine and Shinran’s tariki-shinjin (Other-Power-faith) Jōdoshinshū.
Other principal works attributed to Seikaku include: Daihara dangi kikigaki-shō 大原談義聞書鈔 (KR6t0324) — the notes-record of the famous Ōhara debate of Bunji 2 / 1186, in which Hōnen defended his senju nenbutsu doctrine against the Way-of-Sages opponents at Shōrin-in 勝林院; Sangaku-bunpan 三學文範; Hōji-san 法事讃; and a substantial corpus of hyōbyaku (preaching-tableau texts) in the Agui shōdō style. The Daihara dangi is the principal documentary source for the Ōhara debate, and represents Seikaku’s contribution to the canonisation of Hōnen’s victory at the debate as the founding moment of institutional Pure-Land in Japan.
Wikidata Q11614283.