Question: what can 1 dollar buy in japan?
Answer: If you change it for the current yen rate (10/13/2018—US/yen exchange rate is currently around ¥112.198=$1) at the airport, a bank, an ATM, or hotel, you can buy a canned drink (water, coffee, tea, soda, soup). They range from 70 to 150 yen, but most are ¥110.