One of the things that I try to do while visiting different Countries is eat at McDonalds. They always have something unique that you usually can't get back home.
Bacon Potato Pie. Now this was good! Why can't they make stuff like this in the States?
Teriyaki Burger. In all honesty, this one's better in the States.
When it comes to fruit, the Japanese mean business. The higher end department stores throughout Japan have food markets where you'll find these "designer" fruits. Check out the price!
You haven't been to a cyber cafe until you go to one in Japan. These places come fully equipped with anything and everything you would ever need, you wouldn't need to leave the place for days. You can rent a private room that comes with a bed. You can order a meal. You can take a shower. Hell, you can even smoke. Who needs a hotel when you can just come here to catch a few hours of ZZZs and a clean shower. As a matter of fact, I overheard a gentleman snoozing quite loudly at one of these establishments.