The main currency of Japan is the yen. Represented by the symbol "¥" and also by the currency code JPY, the yen is one of the most traded currencies in the world. It was established as the official currency in 1871 and has become a fundamental part of Japan's economy. The yen is used for all financial transactions within Japan, including daily purchases and banking activities. The currency is known for its stability and is often considered a safe haven in international markets. The Bank of Japan is responsible for issuing and regulating the yen, influencing its value through various monetary policies.