Kanei Tongbao is the era name of the 108th emperor of Japan, Emperor Mizuo. In the second year of Kuanyong (1625, the fifth year of Emperor Xizong's Apocalypse in the Ming Dynasty), Japan began to cast "Kuanyong Tongbao" copper coins. This copper coin was extremely popular after it was circulated among the people. It has been continuously cast from Emperor Mizuo to Emperor Xiaoming until 1867. It has been out of circulation for 242 years and has experienced ten generations of emperors. It is the copper coin that has been used for the longest time and has the largest number of castings in Japan.
It is said that Kuanyongtongbao flowed into China as early as the late Ming and early Qing dynasties. It was originally brought by Chinese and Japanese maritime traders. Since this square-hole copper coin is no different from Chinese copper coins in terms of craftsmanship, it quickly spread among the people. Tongkailai, in the early Qing Dynasty, due to the consumption of a lot of money in the process of unifying the world and expanding externally, there was a situation in which prices fell sharply and transactions were chaotic, which caused copper coins from some neighboring countries to take the opportunity to flow into the country and become popular. In addition to Kuanyong Tongbao, there also appeared in the Qing Dynasty "Changping Tongbao" of the Joseon Dynasty, "Kwangzhong" money of Annan, "Jingsheng" money, etc., and Japan's Kuanyong Tongbao due to its large casting volume and long circulation time, it is even more Very popular with the people.
In the early years of Qianlong, the degree of circulation of Kuan Yongtong has attracted the attention of the government, and it was once suspected to be privately minted money by the people, and another "era name" was used, which was an act of public treason. This incident also alarmed Emperor Qianlong and ordered the governors of Jiangsu, Zhejiang, Fujian and other coastal provinces to thoroughly investigate the matter. Know the ins and outs of this kind of copper coins. Therefore, Yin Jishan, Governor of Liangjiang and Jiangsu Governor Zhuang Yougong, made a joint performance to count the origin of this copper coin.
Emperor Qianlong, who learned the truth, issued an imperial decree, that is, it is strictly forbidden for merchant ships to carry Japanese money, otherwise the punishment will be severe. As for the private collection, it will be taken back by the government. So far, the "Kuanyong Tongbao", which has been circulating in China for nearly two hundred years, is officially suspended.