Can you use US dollars in Japan?

Yes, you can use US dollars in Japan. However, it's not as widely accepted as the Japanese Yen.

Most major stores, restaurants, and hotels in Japan will accept US dollars, but you may get a better exchange rate if you use Japanese yen. You can exchange US dollars for yen at banks, post offices, and currency exchange kiosks in Japan.

When paying for goods and services in Japan with US dollars, you will usually be given change in Japanese yen. The exchange rate used will be the rate set by the Bank of Japan on the day of the transaction.

It's also worth noting that some small shops and restaurants in Japan may not accept US dollars at all, so it's always a good idea to have some yen on hand just in case.