Wu-Men Kuan Koans - Comprehensive and factual information about the Wu-Men Kuan (J. Mumonkan, E. Gateless Gate) koan collection as used in the Zen training. Gateless Gate, aka Mumonkon - The classic collection of koans usually used in introductory koan training. Ma-Tsu 'This Very Mind is Buddha' - Commentary on Wu-men Kuan Case 30 by Ross Bolleter Roshi. Case 5; "Hsiang-yen: Up a Tree" - Commentary by John Tarrant Roshi. Case 5: "Hsiang-yen: Up a Tree" - Commentary by John Tarrant Roshi. Who is Arguing About the Cat? - Moral action and enlightenment according to Dogen.