Ishadō Seifu

Ishadō Ueekata Seifu (伊舎堂 親方 盛富, 1 September 1659 – 15 November 1721), also known by his Chinese style name Ō Jidō (翁 自道), was a bureaucrat of Ryukyu Kingdom.

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.

Ishadō served as a member of Sanshikan from 1712 to 1721.