At that time, the Sansenke (three schools associated with Sen Rikyu) in Kyoto entered a significant period of reform with Joshinsai at the forefront, and as one of the leading disciples in taking on the reformation, Fuhaku was active in the establishment of the Shichijishiki (seven training exercises).
折しも京都の三千家では如心斎を中心に一大改革期を迎えており、それを担う高弟の一人として七事式の制定などで活躍することになる。