Wondering what 1 dollar is worth right now in Japanese Yen?
Wonder no more, with this live chart from xe.com. Just click 'Go!' to see the current rate.
Of course, even though this data is current, don't take this for trading purposes. Just use it for planning a Japan trip.
You may get a slightly worse rate when changing currencies at airports. I recommend using Japan's ATMs to get the best rates while traveling.