Don’t point with a single finger
In the West, nobody really cares about how you give directions to somebody. You can point, nod your head in the general direction, or just give them verbal clues on how to get there. However, if you’re asking for directions in Japan or giving directions, you should never, EVER point with a single finger.
In Japan, pointing with a finger is considered hostile. It means you’re going to engage in fisty-cuffs with the person you’re (accidentally) pointing toward. Instead, if you want to point to a direction, use four fingers while tucking your thumb into your palm. Yes, it feels awkward at first, but you’ll get the hang of it.