Zen is a school of Mahayana Buddhism that originated in China during the Tang dynasty, known as the Chan School , and later developed into various sub-schools and branches. From China, Chán spread south to Vietnam and became Vietnamese Thiền, northeast to Korea to become Seon Buddhism, and east to Japan, becoming Japanese Zen.
Mushin in Japanese and Wuxin in Chinese (無心 "no mind") is a mental state. Zen and Daoist meditators attempt to reach this state, as well as artists and trained martial artists.
Fudōshin is a state of equanimity or imperturbability (literally and metaphorically, "immovable mind","immovable heart"or "unmoving heart"). It is a philosophical or mental dimension to Japanese martial arts which contributes to the effectiveness of the advanced practitioner.
