Koshu-kin was produced based on 1 ryo of Inakame, that is, 4 monme (about 14.9 grams), and the currency units became the basis for koban's face value, 1 ryo.
甲州金は田舎目一両すなわち4匁（約14.9グラム）を基準としてつくられ、この通貨単位が小判の額面1両の基となった。