大毘盧遮那成佛經疏  The Da piluzhena chengfo jing shu (Commentary on the Vairocana-abhisaṃbodhi-tantra). 20 fasc. [T 1796.39.579a-649c], abbr. Dainichikyōsho 大日經疏 or Daisho 大疏, composed by Yixing 一行 in 725 CE. Commentary on the first 31 chapters (6 fasc.) of the Vairocana-abhisaṃbodhi-tantra 大日經 [T 848]. The fascicle numbers of the original and the commentary correspond as follows: 1:1-8, 2:9-10, 3:19:13, 4:12-13, 5:14-17, 6:18-20. Partially based on lectures given by Śubhākarasiṁha 善無畏 at the time of its translation. A great many Sanskrit terms and their Chinese equivalents are described in detail, and Yixing supports doctrinal points with citations from a plethora of Chinese Mahāyāna texts -- occasionally adding insights from his experience with the Tattvasaṃgraha system [T 866]. These informed references to existing traditions, together with the natural authority of Śubhākarasiṁha's comments, contributed greatly to the successful adoption of the Vairocana-abhisaṃbodhi-tantra in East Asia.
(An abridged version, the Dainichikyō gishaku 大日經義釋 [Z.36.507ff], was circulated by Yixing's associates after his death.) Kūkai 空海 frequently quotes Yixing's full commentary in his writings; he was the first to bring it to Japan, where sub-commentaries were written by Saisen 濟暹 [T 2215], Raiyu 頼瑜 [T 2217], Yūhan 宥範 [T 2213], Shōken 聖憲 [T 2539], Yūkai 宥快 [T 2218] and Donjaku 曇寂 [T 2219]; of these, the latter two are perhaps the most helpful.