The unit of Japanese currency is yen. Coins come in 1 yen, 5 yen, 10 yen, 50 yen, 100 yen, and 500 yen. Bills come in 1,000 yen, 2,000 yen, 5,000 yen, and 10,000 yen. (Note: 2,000 yen bills are still in use but are not commonly used in Japan nowadays)