The Middle East

Not so close to Japan and so not a travel hot-spot for ALTs, but you might find yourself transitting through with a couple of days to spare.

where to go:

United Arab Emirates (UAE)

Go on a day trek out to the desert on a camel - best done if you want to spend a night under the stars.
The gold souks and the shopping centre with the ski slope in the middle are worth a visit.
Check out the sights of the Old Town with super traditional white stone arabic buildings and sand streets.
Jump in a dhow(boat) and cruise down Dubai Creek marvelling at the world's biggest infrastructure site which is Dubai. The Old Town will be at one end and the most modern and elaborate hotels and buildings on earth will be at the other. Get off at either side you please and browse around.
If you want to do both extremes - get in a taxi or bus. It will be really hot, so a taxi with aircon might be your best bet. It will probably cost at MOST 1500 yen to get from the far end of Dubai city to the other. (Most people in Dubai are actually from India and they speak English.) You can set a fare before you get in a taxi, too.