boja is simply Siamese
Buddhism which filtered into the country from about 1250 onwards. The
older Buddhism of Camboja, for which see below, was quite different.

At the courts of Siam and Camboja, as formerly in Burma, there are
Brahmans who perform state ceremonies and act as astrologers. Though
they have little to do with the religion of the people, their presence
explains the predominance of Indian rather than Chinese influence in
these countries.

4. Tradition says that Indian colonists settled in Khotan during the
reign of Asoka, but no precise date can at present be fixed for the
introduction of Buddhism into the Tarim basin and other regions commonly
called Central Asia. But it must have been flourishing there about the
time of the Christian era, since it spread thence to China not later
than the middle of the first century. There were two schools
representing two distinct currents from India. First the Sarvastivadin
school, prevalent in Badakshan, Kashgar and Kucha, secondly the Mahayana
in Khotan and Yarkand. The spread of the former was no doubt connected
with the growth of the Kushan Empire but may be anterior to the
conversion of Kanishka, for though he gave a great impetus to the
propagation of the faith, it is probable that, like most royal converts,
he favoured an already popular religion. The Mahayana subsequently won
much territory from the other school.

5. As in other countries, so in China Buddhism entered by more than one
road. It came first by land from Central Asia. The official date for its
introduction by this route is 62 A.D. but it was probably known within
the Chinese frontier before that time, though not recognized by the
state. Secondly when Buddhism was established, there arose a desire for
accurate knowledge of the true Indian doctrine. Chinese pilgrims went to
India and Indian teachers came to China. After the fourth century many
of these religious journeys were made by sea and it was thus that
Bodhidharma landed at Canton in 520[13]. A third stream of Buddhism,
namely Lamaism, came into China from Tibet under the Mongol dynasty
(1280). Khubilai considered this the best religion for his Mongols and
numerous Lamaist temples and convents were established and still exist
in northern China. Lamaism has not perhaps been a great religious or
intellectual force there, but its political importance was considerable,
for the Ming and Manchu dynasties who wished to assert their rule over
the Ti