Sen no Rikyū, the 16th Century Japanese master of the tea ceremony
After Toyotomi Hideyoshi ordered Rikyū's death, Nagachika sheltered Rikyū's son, Sen Dōan.
According to A.L. Sadler, the earliest extant example of a space attached to a chashitsu (room intended for the tea ceremony) that is describable as a mizuya exists at the Taian, a chashitsu designed by Sen Rikyū.
The Omotesenke estate, known by the name of its representative tea room, the "Fushin-an" (不審庵), was where Sen Rikyū's son-in-law, Sen Shōan, reestablished the Kyoto Sen household after Rikyū's death.
Rikyū's natural son, Sen Dōan, took over as head of the Sakaisenke after his father's death, but the Sakaisenke soon disappeared because Dōan had no offspring or successor.