(Chin., Wu-men kuan; Jap., Mumonkan).
A collection of kōans compiled by the Chinese Ch'an master Wu-men Hui-k'ai (1183–1260) and published in 1229. It contains 48 stories of Ch'an encounters between various well-known Chinese Ch'an figures that shows a decisive moment in their teaching. These stories, given in a very condensed form, are accompanied by Wu-men's own comments and a short poem. It gained wide currency in China.Japan.Korea.and more recently, in Europe andAmerica.