Around 1940, Yoshimoto and his mentor Teishin KOMATANI started to reform Mishirabe by eliminating its secrecy and penance into Naikan, a method of mind cultivation for everyone.
昭和15年ごろから吉本は師の駒谷諦信とともに身調べから秘密性、苦行性を除き、万人向けの修養法・内観に改革してゆく。