Japanese Zen is derived from the Japanese pronunciation of the Middle Chinese word 禪 (Chan) which traces its roots to the Indian practice of dhyāna ("meditation"). Buddhism was introduced to China in the first century CE. According to tradition, Chan was introduced around 500 CE by Bodhidharma, an Indian monk teaching dhyāna. He was the 28th Indian patriarch of Zen and the first Chinese patriarch. Buddhism was introduced in Japan in the 8th century CE during the Nara period (710-794) and the Heian period (794–1185). Zen was not introduced as a separate school in Japan until the 12th century during the Kamakura
History of Buddhism may have arrived as early as the 3rd or 2nd century BCE via India, or alternatively during the 1st or 2nd century from China. Whatever the case, Mahayana Buddhism had been established by the second century CE in Vietnam. By the 9th century, both Pure Land and Thien (Zen) were major Vietnamese Buddhist schools. In the southern Kingdom of Champa, Hinduism, Theravada and Mahayana were all practiced until the 15th century, when an invasion from the north led to the dominance of Chinese-based forms of Buddhism. However Theravada Buddhism continues to exist in the south of Vietnam. Vietnamese Buddhism is