1708: He attained enlightenment through a koan (small presentations of the nature of ultimate reality, usually presented as a paradox) called 'Joshu muji' (a question asking whether it is possible for a dog to have the Buddha nature or not) as he studied under Shotetsu of Eigen-ji Temple in Takada, Echigo Province (present-day Niigata Prefecture).
1708年　越後国（新潟県）高田の英巌寺性徹のもとで「趙州無字」の公案によって開悟。