Jōken 成賢 (1162–1231) was the foundational master of the Daigo-ji Kakudō-in 醍醐寺覺洞院 sub-temple, the great Shingon scholastic institution of the early Kamakura period. He was a senior disciple of Shōken 勝賢 (1138–1196; see KR6t0193, KR6t0195), the Tōji chōja and Sanbō-in head; through Shōken he inherited the principal late-Heian transmissions of both the Hirosawa-ryū and Ono-ryū traditions. He himself rose to Tōji chōja and abbot of Daigo-ji and served as the religious counselor of the kanpaku Kujō Kanezane 九條兼實 (1149–1207), through whose patronage the Kakudō-in attained its institutional standing.
Jōken’s principal scholarly contribution is the sixteen-fascicle KR6t0201 Bó shuāng zhǐ (Usushi), the great early-Kamakura ritual encyclopedia and the direct precursor of the later Kakuzen-shō (KR6t0226).
Surviving work in the Kanripo corpus: KR6t0201 Bó shuāng zhǐ (16 fasc.).