(also known as Katagiri Sadamasa or Katagiri Iwami-no-kami Sadaaki) was a Japanese daimyō, tea master, Buddhist monk and painter of the early Edo period.Sadler, Cha-No-Yu: the Japanese tea ceremony, 1962, pp. 174–175.谷晃『茶会記の風景』河原書店、1985年。ISBN 978-4761100810。(in Japanese) He was the son of Katagiri Sadataka and held the fief of Koizumi in Izumi Province with an income of 10,000 koku. A pupil of Kuwayama Sōsen, he was the founder of the Sekishu-ryu school and was known for his taste, judgment, and deep knowledge of tea philosophy. He was appointed tea master to Tokugawa Ietsuna.桑田忠親『茶の美』秋田書店、1965年。(in Japanese)
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