Wumen Huikai

Wumen Huikai (simplified Chinese: 无门慧开; traditional Chinese: 無門慧開; pinyin: Wúmén Huìkāi; Wade-Giles: Wu-men Hui-k'ai; Japanese: Mumon Ekai) (1183–1260) was a Chinese Chán (Japanese: Zen) master during China's Song period. He is most famous for having compiled and commentated the 48-koan collection The Gateless Barrier (Japanese: Mumonkan).