ATMs
Available everywhere
Automatic teller machines (local names: ATM or 現金自動預け払い機) are everywhere in Japan. Pretty much anywhere you look there will be an ATM. Japan has one of the highest ATM densities in the world.
You do not need a chip & PIN card to use an ATM — your standard magnetic card will work fine.
Exchange rate
The exchange rate you'll get on an ATM is usually the best one you'll get. You’ll pay fees, but you’ll still get a better rate than you would exchanging cash at a bank or exchange booth.