Japan is a very traditional country. If you ever visit, please make sure to blend in by following our customs!

One of the easiest ways to demonstrate to the locals that you're not just some dumb gaijin noob is knowing how to choose the best seat on the subway. Everyone knows that the goal is to score the seat with the maximum upskirt opportunity factor.
That means planting yourself where a beautiful lady is sitting across from you, ideally wearing a revealing skirt or dress. (Her. Not you!). In time she will be sure to reward your wise choice of seat by flashing her panties at you.

A man who does not maximize his upskirt opportunity factor is considered an imbecile and brings great shame upon his family. Don't be that guy. Always make an effort to fit in!