This document summarizes the reasons for the strong Japanese yen and its implications for Japan's export-driven economy. It explains that Japan has a large trade surplus which creates high demand for yen, strengthening the currency. A strong yen could hurt exports in the long run by making Japanese goods more expensive overseas. However, in the short term the yen reinforces itself by reducing the supply needed for imports. The document also notes that while a weak US dollar doesn't necessarily mean a strong yen, Japanese consumers benefit from a stronger currency keeping domestic costs of goods stable.