Buddhism in Asia: A Map of Where It Spread
Buddhism began in the Ganges plain of north India and became a pan-Asian religion over roughly a thousand years, travelling by land and sea with monks, merchants and rulers. It was never a single wave. Different schools reached different places at different times, and in each region it blended with local customs and beliefs.
This account follows the main routes in rough chronological order. Dates for early periods are approximate, and where sources disagree this is noted.
The homeland: north India
The tradition says the Buddha taught in the Gangetic plain, in places such as Bodh Gaya, Sarnath and Rajagriha. Early followers were monks and nuns who travelled, except in the rainy season. Over the following centuries the community split into several schools, and teachings were preserved orally before being written down. Lumbini, in present-day Nepal, which tradition names as his birthplace, is a UNESCO World Heritage Site.
The Mauryan period and Ashoka
Emperor Ashoka, who ruled much of the subcontinent in the third century BCE (the reign is usually dated about 268 to 232 BCE), is the figure most associated with Buddhism’s early expansion. His rock and pillar edicts, written in local scripts and languages, promote ethical conduct and mention sending envoys to distant realms. Later Sri Lankan chronicles credit him with sending his son or relative Mahinda to bring Buddhism to Sri Lanka, an event that began a lasting Theravada tradition on the island. Historians treat these chronicles as valuable but partly legendary.
Northwest India, Central Asia and the Silk Road
Buddhism travelled northwest into Gandhara, an area covering parts of present-day Pakistan and Afghanistan. There, contact with Greek-influenced art helped produce the first widely known images of the Buddha in human form. Under the Kushan rulers, whose empire covered Central Asia and north India in the first centuries CE, monasteries grew along trade routes.
Merchants were important carriers. Oasis towns on the Silk Road, such as Khotan and Kucha, hosted monasteries that supported travellers and translated texts. The Bamiyan Buddhas in Afghanistan, carved into a cliff and destroyed in 2001, show how far this tradition reached.
China
Buddhism reached China through Central Asia in the early centuries CE. A traditional story places its official introduction in the reign of Emperor Ming of Han in the first century, but modern historians generally see a gradual process. Monks such as Kumarajiva, who translated texts in the early fifth century, and pilgrims such as Faxian and Xuanzang, who journeyed to India, shaped Chinese Buddhism. Xuanzang’s travels in the seventh century are among the best-documented. Schools including Chan (the root of Zen), Tiantai and Pure Land arose in China and later spread elsewhere. The caves at Dunhuang preserved thousands of manuscripts.
Pilgrims left personal records. The monk Faxian travelled from China to India around the turn of the fifth century CE, and Xuanzang left China in 629 and returned in 645 with hundreds of manuscripts, later recorded in his travel account. Another monk, Yijing, went to India by sea in the late seventh century and described monastic life in Southeast Asia on the way, which is useful evidence for the maritime route.
Korea, Japan and Vietnam
From China, Buddhism spread east. Traditional sources give a date for its arrival in the Korean kingdom of Goguryeo in the fourth century, and in the Baekje kingdom soon after. Japan’s traditional dates for its official introduction fall in the sixth century, sometimes given as 538 and sometimes 552, which shows how much the early chronology is debated. Over time, Japanese Buddhism produced distinct schools, among them Tendai, Shingon, Zen and Pure Land. Vietnam received Buddhism both from China and by sea routes from India.
The island of Sri Lanka and the Theravada line
Sri Lanka deserves its own mention because its monastic communities preserved a body of scripture in the Pali language and a continuous ordination lineage that later monks in Myanmar, Thailand and elsewhere looked to. According to the island’s chronicles, the Buddhist canon was first committed to writing there in the first century BCE, a claim that scholars regard as plausible though they cannot confirm every detail. This is why Sri Lanka is often described as a hub from which a particular form of Buddhism radiated across the Bay of Bengal.
Tibet and the Himalayas
Buddhism entered Tibet gradually, with strong royal patronage from the seventh to ninth centuries. Teachers and texts arrived from India, and the Vajrayana tradition flourished. Following a period of political fragmentation, monastic lineages were re-established, and Tibetan Buddhism later spread to Mongolia and regions such as Bhutan.
Southeast Asia
Maritime trade linked India to the Malay world, and Buddhism arrived alongside Hinduism. Over the first millennium CE, Buddhist kingdoms rose in places like Java, whose Borobudur monument was built around the eighth and ninth centuries, and in Srivijaya on Sumatra. Later, Theravada gradually became the main tradition on the mainland, in Myanmar, Thailand, Cambodia and Laos, helped by contact with Sri Lanka.
Routes at a glance
| Route | Main period | Carried to |
|---|---|---|
| Overland through Central Asia | Early centuries CE onward | China, then Korea and Japan |
| Sea routes across the Indian Ocean | First millennium CE | Sri Lanka, Southeast Asia, southern China |
| Over the Himalayas | Seventh century onward | Tibet, Mongolia, Bhutan |
These routes overlapped, and many monks and goods moved along more than one of them.
Decline in India
Buddhism gradually receded in much of India from about the end of the first millennium CE. Scholars give several interlinked reasons, including loss of royal patronage, the revival of other traditions and political upheavals, but they disagree about the weight of each. Monastic universities such as Nalanda declined by the twelfth century.
Why it matters today
The spread of Buddhism helps explain why its art, rituals and texts look so different in Sri Lanka, Japan and Tibet, even where teachings overlap. It also shows how religion travels along trade, diplomacy and scholarship. For a doctrinal overview, see the Buddhism section, and for more on the field in general, return to the home page.
Frequently asked questions
Where did Buddhism begin?
Buddhism began in north-eastern India, in the Ganges basin, according to its own tradition and to historians.
How did Buddhism spread along the Silk Road?
Merchants, monks and rulers supported monasteries along trade routes, and translators made texts available in local languages as the religion moved east.
Who was Ashoka?
Ashoka was a Mauryan emperor of the third century BCE. His inscriptions and later Buddhist traditions connect him with promoting Buddhist ethics and sending missions abroad.
Why did Buddhism decline in India?
Scholars cite changing patronage, competition from other traditions and political change, but there is no single agreed explanation.