Ryōbu Shintō presents musubi as the fundamental principle of divine union that binds together kami, Buddhas, and the phenomenal world within a single, non-dual reality. The creative musubi power associated with primordial kami such as Takami-Musubi and Kami-Musubi is read as identical in essence to the formative activity of Dainichi Nyorai, whose cosmic Buddha-body underlies all manifestation. Through this lens, Shintō creation myths are not discarded but reinterpreted as localized expressions of a universal Buddha-reality, so that the distinction between kami and Buddhas becomes one of appearance rather than ultimate nature. Musubi thus names the very process by which the cosmic Buddha manifests as Shintō deities while remaining unchanged in its original ground.

This interpretive move is articulated through the honji–suijaku paradigm, in which Buddhist deities are the original ground (honji) and Shintō kami are their trace manifestations (suijaku). Musubi, as “binding” or “joining,” explains how these two levels are inseparably linked: the same enlightenment that appears as Buddhas in doctrinal form appears as kami in the Japanese landscape. In this way, musubi becomes both a cosmological and hermeneutical key, allowing the scriptures to affirm the efficacy of indigenous deities while situating them within an esoteric Buddhist framework. The result is a vision of reality in which Shintō and Buddhism are not rivals but complementary expressions of one underlying union.

On the ritual level, musubi is not merely a metaphysical idea but a lived, enacted union. Esoteric practices such as mantra recitation, mudra, and mandala visualization are understood to create a musubi between the practitioner’s body, speech, and mind and the body, speech, and mind of the Buddha-kami. Shrine–temple complexes and paired worship of kami and Buddhas function as concrete embodiments of this union, architecturally and ritually inscribing the non-dual relationship of the two traditions. Through such practices, the practitioner participates in the same creative force that links honji and suijaku, allowing musubi to be experienced rather than merely contemplated.

At the soteriological and symbolic levels, musubi is associated with both the life-giving, generative power celebrated in Shintō and the realization of Buddhahood emphasized in esoteric Buddhism. The awakening of the practitioner is framed as being “bound into” the original enlightenment of Dainichi as expressed through the kami, a process in which ignorance is untied and the intrinsic unity of human, kami, and Buddha is recognized. Traditional Shintō themes of joining complementary opposites—such as male and female or heaven and earth—are preserved, yet they are overlaid with esoteric readings that see these pairings as expressions of non-dual union. In this way, musubi becomes the name for a dynamic, ever-active process by which opposites are harmonized, realms are joined, and the hidden unity of all things is disclosed.