On the occasion of a memorial service for the thirty-third anniversary of the death of Eiso's master, Donchu Doho, which was held in March 1441, he became a monk (teihatsu-seni (literally, taking the tonsure and dyeing vestments)) at the age of 13, at Higashiyama Yogen-in Temple, by worshipping Doho's Chinzo (a portrait of a Zen monk) and forming the relationship of master and disciple.
嘉吉元年（1441年）3月、英叟の師・曇仲道芳の三十三回忌にあたり、13歳にして東山養源院において頂相を拝して師資の礼を結び、薙染（剃髪染衣）した。