The name "gin (silver)" and "za (place)" is believed to originate from the fact that a mint chiefly issuing silver coins was located there and also that minting such coins in other areas was strictly controlled.
当時の主な通貨のうちの銀貨の鋳造が行われたこと、この場所以外での貨幣鋳造が厳しく取り締まられたこと、などにより「銀・座」の名が付けられたと思われる。