Sado (佐渡市, Sado-shi) is a Japanese city on Sado Island (佐渡島, Sadoshima) in Niigata Prefecture.[1]
Uesugi Kagekatsu took control of the island in the late 1580s.[2]
In the Edo period, gold was discovered on the island. The Tokugawa shogunate took direct control of it. It was administered by an official called the Sado-bugyō. Okubo Nagayasu was appointed to this position by Tokugawa Ieyasu[1] in 1603.[3]
In the Meiji period, the island became part of Niigata Prefecture.[1]