Who was Japanese money made of?

Historically, Japanese currency, particularly during the Edo period, was often made from precious metals such as gold and silver, which were used to mint coins called "mon." During the Meiji Restoration, the government introduced a modern currency system, leading to the production of banknotes and coins made from various materials, including paper and base metals. Today, Japanese yen banknotes are primarily made of a special paper blend, while coins are made from metals like nickel and copper.