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
Karma in Buddhism without intending to do this, karma may in fact support social passivity or acquiescence in the face of oppression of various kinds." Dale S. Wright, a scholar specializing in Zen Buddhism, has proposed that the doctrine be reformulated for modern people, "separated from elements of supernatural thinking," so that karma is asserted to condition only personal qualities and dispositions rather than rebirth and external occurrences. Loy argues that the idea of accumulating merit too easily becomes "spiritual materialism," a view echoed by other Buddhist modernists, and further that karma has been used to rationalize racism, caste, economic oppression, birth handicaps