Eiken 英憲 (b. ca. 1463 — alive 1531) was a Japanese late-Muromachi / Sengoku-period (室町時代後期・戰國時代初期) Sanron-school 三論宗 (Madhyamaka) scholar-monk based at the Kangaku-in 勸學院 of the Onjō-ji (Mii-dera) 三井寺・園城寺 in Ōtsu. DILA Authority A000874.
He is the author of the twenty-nine-fascicle 倶舍論頌疏抄 Kusharon jushōshō (KR6l0044, T64n2254), the principal Japanese medieval running sub-commentary on the Tang commentator Yuanhui 圓暉’s (圓暉) Jùshě Lùn Sòngshū (KR6l0036, T1823). The work was composed in successive lecture-cycles at the Onjō-ji Kangaku-in over the years 1507–1531; its internal colophons document Eiken’s career-progression from junior 大法師 (Eishō 4 / 1507) through gikō 擬講 (deputy lecturer; from Eishō 17 / 1520) to 法印權大僧都 Hōin Gondaisōzu (by Kyōroku 4 / 1531). The two age-anchors in the colophons — suì 60 in Daiei 2 (1522) and suì 69 in Kyōroku 4 (1531) — converge on a birth-year of c. 1463.
Eiken’s death-year is not preserved; he was alive in late 1531 to sign the closing colophon. The DILA Authority record A000874 lists him as Japanese with no further information; the present dating is established from internal colophons in T64n2254.
Source: T64n2254 internal colophons (lines 16686, 7079, 5566, 4123, 10820, 15695, 26214 of /home/Shared/krp/KR6l/[[KR6l0044]]/[[KR6l0044]].txt); Bukkyō daijiten s.v. 英憲.