, also known by his Chinese style name , was a bureaucrat of the Ryukyu Kingdom."Ishadō Seifu." Okinawa konpakuto jiten (沖縄コンパクト事典, "Okinawa Compact Encyclopedia").
Ishadō had been dispatched as envoys to China and Japan for several times. In 1694, he brought yellow potatoes from Fujian Province, China and planted them around his house. Later, he spread them to people. The yellow potatoes propagated around the country and soon became the main food of common people.Kyūyō, vol.8
Ishadō served as a member of Sanshikan from 1712 to 1721.Chūzan Seifu, vol.9
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