Sìfēn yì jílüè sījì 四分義極略私記
Maximally Abbreviated Private Records on the Doctrine of the Four Divisions by 忠算 (撰)
About the work
A two-fascicle Hossō sub-commentary on Zenju’s KR6t0017 Wéishí fēnliàng jué by Chūsan 忠算 (also read Tadasan, “Saidai-ji bettō Chūsan”), the late-Heian / early-Kamakura Saidai-ji 西大寺 administrator-monk. The work — “Maximally Abbreviated Private Records” — is precisely what the title says: the most compressed possible exposition of the four-division doctrine, distilling Zenju’s treatise into a study-manual for use by Hossō students. As the 1750 Kan’en re-engraving preface by Genki 賢基 puts it: “Among the southern-capital old masters who treated Hossō, only Zenju is worthwhile. Now Shōshitsu Chūsan-shi, basing himself on Zenju’s Bunryō-ketsu*, has made these private records — they too are worthwhile.*“
Abstract
Authorship and dating: The author’s signature in the body of the text reads “Saidai-ji bettō Chūsan zhuàn” 西大寺別當忠算撰 — “Chūsan, bettō (administrator) of Saidai-ji, has composed this.” Chūsan 忠算 (DILA A000625) is documented only by this canonical attribution and the office title; the Saidai-ji administrator role places him in the late Heian or early Kamakura period (Saidai-ji was a major imperial monastery from its 8th-century foundation, but the bettō role as documented in monastic records flourished from the 11th century). He should not be confused with the similarly-named Chūzan 仲算 (KR6t0016 author, 935–976), with whom he is often confused: the two are different persons, written with different characters (忠 vs 仲), though both pronounced Chūsan / Chūzan.
Without more precise external evidence, the composition date is bracketed at the broad range plausible for the Saidai-ji bettō who would have worked from Zenju’s Bunryō-ketsu: notBefore = 1050, notAfter = 1200.
Doctrinal content: Chūsan’s work is structured as a question-and-answer compendium on the four divisions of consciousness (sìfēn 四分). The opening question — “How many gates does the master’s commentary employ in treating the four divisions?” — receives the answer: “The principal commentary establishes no specific gates for the explanation. Only Zenju Sōjō’s Bunryō-ketsu has two gates: one is the self-essence gate; the other is the question-and-answer differentiation gate.” Chūsan then proceeds to systematise the four divisions under Zenju’s two-gate scheme, supplying his own examples and addressing the standard fángnàn (spoiling-objections) of the Yuima-e debate tradition.
The work entered the Edo Hossō curriculum through the 1750 Genki reprint, which corrected the prior printed edition by collating against a better manuscript. As Genki notes in his preface: “To pursue Hossō learning one must first be conversant with the four divisions; once the four divisions are clear, the consciousness-only doctrine and principle is self-evident. Therefore this sījì cannot but be read.”
Translations and research
- No substantial Western-language secondary literature located.
- Mochizuki, Bukkyō daijiten, s.v. Chūsan 忠算 (the Saidai-ji bettō) and Shibun gi gokuryaku shiki 四分義極略私記.
- Yūki Reimon 結城令聞, Yuishikigaku tenseki-shi 唯識学典籍志.
Other points of interest
The work is one of the few medieval Japanese Hossō texts that explicitly treat the four divisions of consciousness as a stand-alone doctrinal topic, separated from the larger Chéng wéishí lùn exegetical apparatus. As the principal sub-commentary on Zenju’s KR6t0017 Bunryō-ketsu, it documents the long Heian-Kamakura continuity of the Zenju tradition and its eventual entrance into the Edo Hossō curriculum via the Saidai-ji transmission line.