Shēngzì shíxiàng yì 聲字實相義
The Meanings of Sound, Letter, and Reality (Shōji jissō gi) by 空海 (撰)
About the work
The single-fascicle foundational doctrinal treatise on the metaphysics of language by Kūkai, establishing the Esoteric Buddhist doctrinal position that sound (聲), letter (字), and reality-as-such (實相) are non-dual: the mantra and bīja (seed-syllable) are not symbols of a reality but are themselves manifestations of the dharma-kāya. The work is one of the four foundational doctrinal treatises of the Shingon school, together with the Jūjūshin-ron (KR6t0125), Hizō hōyaku (KR6t0126), and Sokushinjōbutsu-gi (KR6t0128).
Abstract
Authorship. Universally attributed to Kūkai.
Date. Conventionally 815–824 CE, contemporary with the Sokushinjōbutsu-gi and Hīnyuṣṇīṣa-yì (KR6t0136 Hōng-zì yì). The three works share the same programmatic phase of Kūkai’s doctrinal-systematic articulation.
Structure. The work organizes itself into three explicit sections, as announced in the opening:
- Statement of intent (叙意).
- Exposition of name, body, and meaning (釋名體義).
- Question-and-answer (問答).
The opening declaration:
“The Tathāgata, in expounding the Dharma, necessarily depends on letters. The site of letters is the six dusts (the six sense-objects: form, sound, smell, taste, touch, dharmas); the body of these six dusts is the Three Mysteries of the dharma-kāya. The equal Three Mysteries pervade the Dharma-realm and are constant; the Five Wisdoms and Four Bodies complete the Ten Realms…”
Content. The work develops three closely-coordinate doctrinal theses:
-
Letters / sounds as the universal substrate of communication. All teaching, all Buddha-discourse, all sentient-being communication, takes place through letters. Letters are not arbitrary tokens but a metaphysically-real body (體) of communication.
-
The six sense-objects (六塵) as the substrate of letters. Letters are extensions of the six sense-objects; the body of the six dusts is the Three Mysteries of the dharma-kāya. Therefore: the substrate of communication is itself the dharma-kāya.
-
Reality-as-such manifest in letters. The “shíxiàng” 實相 (reality-as-such, ultimate-truth) is not a hidden noumenon behind letters and sounds; it is directly manifest in them. The mantra is not a code-symbol for an inner reality; it is the inner reality.
The doctrinal-philosophical move is one of the most original in the Mahāyāna doctrinal tradition: a non-mediated semiotics in which signifier and signified are non-dual, and the Esoteric letter (shingon / 真言 — “true-word”) is the ultimate ontological reality directly manifest.
Significance. The work is the foundational doctrinal anchor of the Shingon doctrinal position on the metaphysical status of mantra / bīja-syllables. All subsequent Shingon doctrinal-philosophical engagement with the question — including the great medieval traditions of aji-kan (阿字觀, the Letter-A contemplation, cf. KR6t0138, KR6t0144, KR6t0145) — develops from this foundational text. The work is part of the central doctrinal-textual canon studied in the Shingon scholastic curriculum throughout the medieval and modern period.
Translations and research
- Yoshito S. Hakeda (tr.), Kūkai: Major Works (Columbia, 1972) — full translation.
- Rolf W. Giebel (tr.), The Meanings of Sound, Sign, and Reality — in Shingon Texts (BDK English Tripitaka, 2004), pp. 85–103.
- Ryūichi Abé, The Weaving of Mantra (Columbia, 1999) — substantial doctrinal-philosophical analysis.
- Thomas Kasulis, Engaging Japanese Philosophy (Hawaii, 2018) — chapter on Kūkai’s philosophy of language.
- Yamasaki Taikō 山崎泰廣, Shingon: Japanese Esoteric Buddhism (Shambhala, 1988).