What is the currency used in Japan?

The currency used in Japan is the Yen. It serves as the standard monetary unit in Japan and is represented by the symbol "¥". The yen has a significant role in the global economy and is one of the most traded currencies in the world. Its importance is reflected in various international financial markets and transactions.

The other options represent different currencies from other countries: Yuan is the currency of China, Won is used in South Korea and North Korea, and Ringgit is the currency of Malaysia. Each of these currencies pertains to their respective nations and has distinct values and contexts compared to the yen used in Japan.