Ceramics studio Jinsui is one of the six oldest studios in the Tokoname ceramic production region. The studio was started in 1900 by Yasumasa Watanabe as Yamaya Yasumasa Watanabe, and ini 1971 was renamed Jinsui by his son Yoshiji. Toshimasa became the 3rd generation master in 1990, and Yasumasa's great grandson Yusuke continues the business today as the 4th head since 2011.