The content percentage of gold was displayed as ryome of mixed metal, adding silver to genuine gold 44 monme, for the convenience of the workplace in kin-za (an organization in charge of casting and appraising of gold during the Edo period).
金の含有率の表示は、金座における作業場の便宜を図るため生粋金（純金）四十四匁に差銀した合金の量目で表示された。