Because Chogin did not have a face value and was Hyodo kahei (currency valued by weight) and their Ryome needed to be weighed every time they were used, they were inconvenient, so they were used in the form of Hogin.
丁銀は額面の記載されていない秤量貨幣で、本来は使用のごとに量目を量る必要があるが、それでは扱いづらいため、包銀の形で用いられた。