Chado or Sado (Tea Ceremony) The Three Senke Schools Sen So'oku, the future grand master of Mushakouji Senke Sen no Rikyu (1522-1591), who perfected chado, was a successful merchant who was respected even by Japan's ruler of the time, Toyotomi Hideyoshi (1537-1598). He hosted various tea events and was also deeply involved in politics. After the death of Rikyu, the art of chado was passed down t..