Since the Song Dynasty in China, the main Japanese currencies have been copper coins (Song coins, Yongle coins, etc.). Especially during the Warring States period, a large number of Yongle coins were imported from China, which led to the shortage of money in the Ming Dynasty. At the same time, silver coins and gold coins (that is, silver coins and gold coins with a certain weight) were also used, but the use of gold coins was relatively small.

Gold and silver are produced in Japan, but because their own value is too high and people usually need to use small denomination currency, copper coins are mainly used in circulation, and gold and silver are mainly used for transactions such as high-value commodities.

Remarks: Japan's local gold and silver reserves are very large, which have been shown since the era of great navigation 2.