In 1526, Hakata merchant Ōya Jotei began development; adoption of cupellation in 1533 increased silver output. After the Ōuchi and Amago clans competed for control, the Mōri gained it in 1562, and it became directly administered by the Tokugawa after Sekigahara.
Development dates vary within Ōta City records (1526 or 1527); the 1526 date is based on the later-composed 'Ginzan Kiji.'
Certainty: DisputedHow far the account above is supported by the cited sources. It does not refer to the precision of the coordinates or the dating.
See it on the 1526 map