I lived there from the time I was ten till I was sixteen. My dad was in the Navy. I loved it. If he is going to the Tokyo area I can help on places to visit. Keep in mind I moved back stateside in '95. Gosh, was it that long ago? There is a wonderful amusement park called Toshimayen. It is a great water park, the Disneyland-esque section is not that great. If he can he should eat at a traditional sushi type place. There is a bar with a conveyer belt on it that the dishes go around on. The more elaborate the plate the more expensive the dish. Tell him to stay away from things he can eat here. How often will he get to go to Japan after all. I am assuming he'll be there over the summer. If so that is when all of the towns have their Bon-o-dori festivals. He should go. It's like a big street fair with traditional dancers. It is very fun. Japan is quite humid in the summer. I hope he knows that. Climb mt. Fuji, at least part way, visit a shinto shrine, don't eat and walk at the same time, it's considered rude. Most subway signs are also in english. Make sure he memorizes the phrase " where's the bathroom". I would stay away from the squid, it's just to chewey. Tempura is awesome and he should get some gyoza to eat. Umm... can you tell one of the things that I miss the most about Japan? Have him take pictures of the vending machines. You can buy hot coffee in the can, cold soda, eggs, pantyhose, cigarettes, kids trading cards, comic books, "adult movies" and "adult magazines" and alcohol in them. Just walking down the street. It's crazy. People smoke everywhere, it sucks. If he has asthma make sure he takes his meds with him. The polution is bad! Most of all relax and have fun. Don't worry about him too much over there. Tokyo is one of the safest cities in the world. I spent most summers roaming around it and the neighboring cities with my friends, also teenagers. The worst that happened was taking the wrong subway home and ending up another hour from home before we got going back the right way. Hope this helped.
Francisca