Dude, Iraq has internet. Everywhere has internet now. Don't worry about not having internet.
I haven't been to Japan or Alaska but I have been to Guam and Hawaii. All I can say about traveling around the world is EAT LOCAL FOOD! Don't go over there and get off the plane thinking "Now where's the McDonalds or Chilis?" You don't get many chances in life to try different foods like that so take advantage. Guam has very interesting local food, a mixture of Asian and Indian foods. Japan I bet has the best seafood of anywhere if you know where to go. Hawaii is Hawaii, but you can still find good food there. The best Mai-Tai I have ever had was in Waikiki.
Enjoy your time overseas and take a ton of pictures. You never know if you will get another chance to do it again.