Zen lineage charts 南浦紹明 (1235–1308), who received transmission in China from the monk Xutang Zhiyu 虚堂智愚 (Japanese "Kido Chigu," 1185–1269) in 1265, who then returned to Japan in 1267. It was then spread by his student Shuho Myocho (second generation) and Kanzan Egen (third generation), who made it an influential school. The two main schools today are Takujū and Inzan, which both descent from Hakuin. Although it is difficult to trace when the West first became aware of Zen as a distinct form of Buddhism, the visit of Soyen Shaku, a Japanese Zen monk, to Chicago during the World Parliament of Religions in
History of Buddhism first western monastics such as U Dhammaloka, Ananda Metteyya and the German Nyānatiloka Thera (1878–1956). Another important element leading to the growth of Buddhism in the west was the large scale immigration of Chinese and Japanese to the United States and Canada in late 19th century. Refugees from Vietnam, Laos and Cambodia have also immigrated to west, beginning in 1975. Asian Buddhists such as DT Suzuki, Hsüan Hua, Hakuun Yasutani and Thích Nhất Hạnh were influential in teaching Zen Buddhism in the West in the 20th century. Shunryu Suzuki opened the Soto San Francisco Zen Center (1961) and the Tassajara