Mainly in western Japan, large-amount transactions were conducted in "shoryo ginka" or silver coins which were hallmarked pieces of cupelled silver mined from a silver mine and whose real values were determined by their weight (mass).
西日本を中心に銀山から山出しされた灰吹銀に極印を打ち、その量目（質量）に応じて実質価値が定まる秤量銀貨が大口取引に利用されるようになった。