Therefore, these low-quality coins were called bitasen coins or akusen coins and were valued less than ordinary coins: For example, it was determined at the time that four bitasen coins constituted one mon ("mon" is a monetary unit at that time).
そのため、これら粗悪な銭貨は「鐚銭」（びたせん）又は「悪銭」（あくせん）と呼ばれ、一時は撰銭四枚で一文とする取り決まりがなされるなど、一般の銭貨よりも低い価値とされるようになった。