Furthermore, after 1765, the operation of casting small amounts of copper coins was shared by kin-za and gin-za (an organization in charge of casting and appraising of silver during the Edo period) (see the article of gin-za [history]).
更に明和2年（1765年）以後には小額の銅銭鋳造の業務を銀座_(歴史)と分担して行うようになった。