Although cupellated silver coming from silver mines was purchased by the ginza as a rule for minting into Chogin silver, many sought to make profits by shipping the ore directly to Nagasaki rather than selling it to the ginza.
銀山から山出しされた灰吹銀は原則として銀座が買上、丁銀に鋳造することになっていたが、灰吹銀を銀座に売り渡さず直接長崎に送り利益を得る者が続出した。