The spread of Buddhism across Asia has been studied mainly from a perspective focusing on the transmission through the overland routes popularly known as “Silk Roads” and emphasizing Central Asia as an important transit corridor and contact zone between South and East Asia. However, recent scholarship has increasingly recognized the significant role played by the sea routes or maritime “Silk Roads” in shaping premodern intra-Asian connectivity. This has paved the way for an appreciation of the important contribution of the southern rim of Asia—especially South India, Sri Lanka, and Southeast Asia—to the genesis, transformation, and circulation of various forms of Buddhism.
Evidence of the long-distance transfer of Buddhism from its northeastern Indian cradle to the outlying regions of South India, Sri Lanka, Southeast Asia, and China via the maritime routes goes back to the early centuries of the Current Era. From the 5th century onward, written and material vestiges from the southern rim of Asia became more substantial, testifying to an efflorescence of long-distance maritime contacts that were to last several centuries. As is shown by textual, epigraphic, and art historical materials—including icons, ritual accoutrements, dhāraṇīs, manuscripts, and monuments—Buddhist cults, imaginaries, and ritual technologies flourished across the vast swathe of littoral, island, and hinterland territory that can be conceptualized as the sociospatial grouping of “Maritime Asia.” Buddhist vestiges recovered from the Indian Subcontinent littorals, Sri Lanka, the Maldives Islands, peninsular and coastal mainland Southeast Asia, and what are now called the Indonesian Archipelago and the Philippine islands, speak in favor of the existence of pervasive and sustained multidirectional Buddhist exchanges among interconnected nodes linking South Asia and the Western Indian Ocean to China, Korea, and Japan through the maritime routes. A polycentric, geographically wide, and maritime-based approach is necessary to fully appreciate how religious, mercantile, and diplomatic networks acted as catalysts for transmission of Buddhism far and wide across Asia over nearly two millennia.