The primary currency of Japan is the Japanese yen, symbolized as ¥ and abbreviated as JPY. The yen is one of the most traded currencies in the foreign exchange market and serves as a critical indicator of the Japanese economy. Introduced in 1871, the yen has undergone various changes in its design and value throughout history. The currency is subdivided into smaller units called sen and rin, though these denominations are now rarely used. The yen is essential for domestic financial transactions and international trade involving Japan.