Rinzai (臨済) is one sect of Zen buddhism.
Lin-Chi (same as Rinzai) was also the founder of the Rinzai sect of Zen buddhism. Rinzai's style of teaching was characterized by harsh encounters; punching, kicking, hitting, etc. His sayings were collected into the Rinzai Roku (Record of Rinzai) by his students.
See also: Zen