Lǐqù jīng kāití 理趣經開題
Opening Exposition of the Adhyardhaśatikā-Prajñāpāramitā (Rishukyō) by 空海 (撰)
About the work
A one-juan early-Heian Japanese Esoteric kaidai 開題 on the Lǐqùjīng 理趣經 — i.e. the Adhyardhaśatikā-prajñāpāramitā Mahāsukha vajra-satya-samaya-sūtra 大樂金剛不空真實三麼耶經 般若波羅蜜多理趣品 (KR6c0120, T8n0243), Bùkōng’s 不空 (Amoghavajra) translation. Composed by Kūkai 空海 (空海, 774–835), founder of Japanese Shingon 真言. The Rishukyō (Jp. Rishukyō) is the principal Esoteric prajñā sūtra in the Shingon school and the daily-recitation scripture of the Shingon liturgy; Kūkai’s kaidai on it is correspondingly one of the foundational documents of the Shingon scriptural-exegetical tradition. The text bundled at T2236A actually preserves multiple distinct kaidai lectures by Kūkai, delivered on different occasions (memorial services for the late mothers of named patrons), assembled into a single Taishō entry.
Abstract
The first kaidai in the collection is presented as a lecture given at the funerary memorial for the late mother of Tadanobu-shi 忠延師先妣 (wèi Zhōngyán shī xiānbǐ jiǎng Lǐqùjīng wén 爲忠延師先妣講理趣經文 — “the Rishukyō lecture on behalf of the late mother of Master Tadanobu”). It opens with the classical xiào 孝 (filial-piety) opening pageant — citing the Confucian topos of fánwū fǎnbǔ 反哺 (the raven that feeds its parent in return) and the Buddhist topos of the Buddha himself shouldering his father’s coffin and the liùtōng 六通 (six supernormal powers) used to feed his mother — and then announces the kaidai program: copying out the Mahāsamaya Rishukyō (大三昧耶理趣經), lecturing on its meaning, and arraying a great mandala of offerings for the memorial.
The doctrinal title-exegesis proper then unfolds in the classical Shingon kaidai mode. The full title Jīngāngdǐng dàlè bùkōng zhēnshí sānmóyé jīng bānruò bōluómìduō lǐqù pǐn 金剛頂大樂不空眞實三摩耶經 般若波羅蜜多理趣品 is parsed unit by unit, identifying which portions are Chinese and which Sanskrit (sānmóyé, bānruò bōluómìduō are Sanskrit transliterations) and giving each a threefold fǎyùrén 法喻人 reading — i.e. doctrinal-as-Dharma, doctrinal-as-Simile, and doctrinal-as-Person:
- Jīngāngdǐng 金剛頂 (“Vajra-summit”): (1) the Vajra-yoga-sūtra corpus, both in its “wide” Dharmakāya-recension and its “abbreviated” Nāgārjuna-transmitted 100 000-verse recension (of which this sūtra is the sixth of eighteen sessions in the eighteen-huì 十八會 Vajra-summit assembly cycle); (2) the worldly vajra-jewel as similitude for jiānshí bù biànhuài 堅實不變壞 (firm-real and not subject to alteration); (3) the five-buddha-families pañcakula (佛部, 金剛部, 寶部, 蓮華部, 羯磨部) corresponding to the five great cosmic elements and five wisdoms.
- Dàlè bùkōng 大樂不空 (“Great Bliss, Non-empty”): another name for Vajrasattva 金剛薩埵, the principal Esoteric deity of the Rishukyō. Bùkōng renders Sanskrit amogha, glossed here as 無間 (without interval) — “the great bliss of self-realization and the great joy of converting others are continuous without interruption.”
- Zhēnshí 眞實 (“True-Real”): distinguished from “the false and the deviant”; the pure xìngdé (intrinsic-virtue) bliss that is the true Dharma flavor.
- Sānmóyé 三摩耶 (“Samaya”): rendered děngchí 等持, “equal upholding”; also rùwǒ wǒrù 入我我入 (the Esoteric mutual-interpenetration of practitioner and deity) and shìyuē 誓約 (vow / oath).
The collection then continues with further kaidai talks on the same sūtra, including one titled wèi shīzhǔ jiǎng Lǐqù bānruò jīng wén 爲施主講理趣般若經文 (“Lecture on the Rishukyō prajñā-sūtra for the donor-patron”), which opens with the fúzhì yīn 福智因 (merit-and-wisdom-causes) framework and the eight sufferings bākǔ 八苦, and the dàbēi Pílúzhēnà rúlái sìfāng sìfó shíliù zhūzūn 大悲毘盧遮那如來四方四佛十六諸尊 (the Great-Compassion Mahāvairocana with the four-direction four-buddhas and sixteen attendant deities) invocation. Each kaidai is delivered as a discrete homiletic-ritual unit and treats the same sūtra under a different rhetorical aspect.
Dating is anchored to Kūkai’s post-806 productive period in Japan after his return from the Chángān Esoteric studies with Huìguǒ 惠果; the terminus is his death in 835. The compilation as preserved in T2236A is post-Kūkai, but the individual kaidai texts are Kūkai’s autograph compositions.
Translations and research
- Ian Astley, The Hannya-Rishukyō: A Translation and Study of the Esoteric “Hannya-Rishukyō”, Tring: Institute of Buddhist Studies, 1991 (revised 2004) — principal English study of the Rishukyō in its Shingon context, with extensive discussion of Kūkai’s exegetical tradition.
- Hakeda Yoshito, Kūkai: Major Works, Columbia University Press, 1972 — translates representative kaidai-genre works.
- Ryūichi Abé, The Weaving of Mantra, Columbia, 1999 — standard English monograph on Kūkai’s exegetical method.
- Extensive Japanese-language commentarial literature in the modern Mount Kōya / Daigo-ji scholastic tradition (Matsunaga Yūkei 松長有慶 et al.).
Other points of interest
The Rishukyō is the single most important sūtra of daily Shingon liturgy — chanted in full at every Shingon morning service — and Kūkai’s kaidai on it correspondingly holds a special foundational status in the Shingon scholastic tradition. The text demonstrates Kūkai’s deployment of the kaidai genre in performative-liturgical contexts (memorial services), where the kaidai doubles as both doctrinal exposition and as the homiletic-textual content of the funerary ritual itself — illustrating how Esoteric scriptural exegesis was woven into the everyday institutional life of the early Shingon community at the Heian court.