In 1655, at Sotan's recommendation, Sohen YAMADA went to serve Tadatomo OGASAWARA of the Mikawa Yoshida Domain in Mikawa Province and Sotan allowed him to use the names Fushinan, which had been handed down since Rikyu's time, and Konnichian, the name of Sotan's tea house built for his retirement.
明暦元年（1655年）宗旦の推挙で三河国三河吉田藩の小笠原忠知に仕えた折りに、宗旦は利休以来の不審庵、自らの隠居の今日庵の庵号を用いることを許している。