Let me tell you about the time I had to charm a guard into letting me view some porn.
Where my friend and I wander into 1980s Tokyo, walk around a red light district, and get to experience drunk Japan.
Wherein we start the day late and end up in a temple eating snacks.
If you order Western food in a Japanese-style Western restaurant, be prepared to have your pasta or burger steak taste the same, but different.
If you have a chance to go to the Ghibli Museum in Tokyo, take it.