Emphasizing meditation without expectation, for 10 points, identify this subset of Buddhism prevalent in China and Japan.
Its founder taught the practice of "wall-gazing," and one of its patriarchs wrote The Platform Sutra.  Its masters include Chao-chou and Lin-Chi, and it was brought to America by D. T. Suzuki. The founder of its Soto school, Dogen, established its first independent temple in Japan, and The Blue Cliff Record and The Gateless Gate are associated with it.  Its followers aim to achieve satori, and its Rinzai sect is noted for its use of koans.  Emphasizing meditation without expectation, for 10 points, identify this subset of Buddhism prevalent in China and Japan.
Its founder taught the practice of "wall-gazing," and one of its patriarchs wrote The Platform Sutra.  
{Zen} Buddhism