Born in 1751 as the seventh lord of Matsue Domain in Izumo Province, given name Harusato. He is known as a wise lord who tackled the severe financial difficulties facing Matsue Domain while young, rebuilding domain finances through strict austerity measures and industrial promotion (Unshū abacus, Izumo textiles, and more). He was also deeply devoted to tea, founding "Fumai-ryu" by adding his own refinements to the Sekishu-ryu tradition. The name "Fumai" derives from the Zen phrase meaning "not obscuring the law of cause and effect." He authored "Kokon Meibutsu Ruiju," conducting systematic research and classification of famous tea utensils, and energetically collected and preserved masterpiece utensils that were being scattered across the country. He is considered the person who contributed most to reviving tea culture that had declined in the late Edo period, and is still highly regarded as the quintessential "tea master daimyo." He died in 1818 at age 68.

A rare figure combining economic acumen with cultural refinement. His connoisseurship of tea utensils was unmatched, and his passion for collecting surpassed ordinary bounds.

His systematic classification of famous tea utensils pioneered modern art historical research. Fumai-ryū thrives today centered in Matsue, which is known as the "city of tea."