HaradaâÂÂYasutani School of Zen Buddhism () is a twentieth-century current of Japanese Zen that integrates the silent-illumination practice of the Sà Âtà  school with the complete Rinzai kà Âan curriculum and extends that synthesis to lay practitioners worldwide.
The Harada-Yasutani lineage is distinct in Japanese Zen history because it deliberately fuses the two major Zen schools, Soto and Rinzai, into a single teaching stream and then re-exports that hybrid to lay practitioners around the world. Its first holder, Harada Daiun Sogaku (1871-1961), received full dharma transmission in Sà Âtà  Zen from Harada Sà Âdà  and, unusually, a second transmission in the Rinzai line from Dokutan Sà Âsan, so that in the lineage documents he appears both as the 31st Sà Âtà  ancestor after Dà Âgen and the 8th Rinzai ancestor after Hakuin. His heir Haku'un Yasutani (1885-1973) then formalised this âÂÂdual-inheritanceâ as an independent stream, today called Harada-Yasutani or Sanbà Â-Kyà Âdan, whose subsequent teachers (Yamada Kà Âun, et al.) continued to present Sà Âtà  shikantaza together with the full Rinzai kà Âan curriculum to monks and, for the first time, large numbers of lay men and women, Japanese and foreign alike.
Harada Daiun Sà Âgaku (1871âÂÂ1961) was ordained in the Sà Âtà  school but completed kà Âan training under the Rinzai master Dokutan Sà Âsan, receiving teaching authority while remaining administratively in Sà Âtà Â.His temple, Hà Âsshinji, revived kà Âan work for Sà Âtà  clergy and laity in the 1920s.
HaradaâÂÂs disciple HakuâÂÂun Yasutani (1885âÂÂ1973) completed the kà Âan course in 1953 and, dissatisfied with sectarian bureaucracy, resigned his Sà Âtà  posts to found the lay association Sanbà  Kyà Âdan (ä¸Âå®ÂæÂÂå£, âÂÂFellowship of the Three TreasuresâÂÂ) on 8 January 1954 in Kamakura.
Yasutani began overseas teaching tours in 1962; his collaboration with Philip Kapleau on The Three Pillars of Zen (1965) disseminated sesshin manuals and verbatim dokusan notes to English-language readers. On YasutaniâÂÂs retirement in 1970 he appointed Yamada Kà Âun (1907âÂÂ1989) as Kanchà  (abbot), who expanded the network to Europe and the Americas. In 2014 the organisation adopted the English name Sanbà Â-Zen International.
Despite modest membership (3 790 adherents reported in 1988), scholars identify the stream as a major conduit for ZenâÂÂs globalisation. Lineages deriving from HaradaâÂÂYasutani include the Rochester Zen Center, Maria Kannon Zen Center, Diamond Sangha, White Plum Asanga, and Pacific Zen Institute.