The U.S. dollar is the currency most used in international transactions. Several countries use the U.S. dollar as their official currency, and many others allow it to be used in a de facto capacity. It's known locally as a buck or greenback.
USD Exchange Rates Federal Reserve Bank JPY Japanese Yen Country Japan Region Asia Sub-Unit 1 Yen = 100 sen Symbol ¥In standard Japanese, the yen is pronounced 'en' and literally means 'round object'. It is widely used throughout the world as a reserve currency after the United States dollar, the euro and the pound sterling.
JPY Exchange Rates Bank of Japan