Buddhism Zen Buddhism is divided into two main schools: Rinzai (臨済宗) and Sōtō (曹洞宗), the former greatly favouring the use in meditation on the koan (公案, a meditative riddle or puzzle) as a device for spiritual break-through, and the latter (while certainly employing koans) focusing more on "shikantaza" or "just sitting". Zen Buddhism is primarily found in Japan, with some presence in South Korea and Vietnam. The scholars of Japanese Soto Zen tradition in recent times have critiqued the mainstream Japanese Buddhism for "dhatu-vada", that is assuming things have substantiality, a view they assert to be non-Buddhist and "out of tune
Buddhism in the West the East Asian Mahayana traditions in the West is Zen Buddhism, which was boosted by post-war popularity among the counterculture and influential figures like Shunryu Suzuki. Today it is a popular type of convert Buddhism, in various forms such as Japanese Zen, Vietnamese Thien and Korean Seon. According to Hughes Seager, in America, Zen is "primarily a movement of laity who practice monastic disciplines." The "flagship" institutions of Zen in the United States include the Soto Zen San Francisco Zen Center of Shunryu Suzuki and the Zen Center of Los Angeles of Hakuyu Taizan Maezumi, as well as the Rinzai