context: Japan adopts a modified capitalist economic system, and the currency units are yen (円, ¥, Yen, JPY). Japan is the world's third-largest economy in terms of gross domestic product (GDP), and Japan's economic trends have a major impact on the world economy. However, as the United States led the IT industry in the 1990s, its influence diminished, which in turn accelerated bad debts on land due to Japan's indiscriminate investment, which was devastating to the economy. At present, however, Japan is ranked third in the world as GDP and 18th among OECD countries as a gross domestic product. .
question: What is the currency of Japan?
answers.text: yen