If you remember only one rule, make it this one. Dawn over Mt. Fuji and the Tokyo skyline. Credit: Jackyenjoyphotography/Getty Images People talk a lot about the complexity of etiquette in Japan , but in 20 years of living here, I think all the ins and outs really boil down to one thing: demonstrating respect for others. That’s why, as a Tokyo local, the best etiquette tip I can give visitors is to be punctual. It requires no skill in the language, no understanding of the social hierarchy or one’s place in it, and no memorization of the subtle meanings in the angle of a bow. And yet it demonstrates a respect toward everyone you meet and the value of their time. While in many Western countries and especially the Latin world, showing up fashionably late is the norm, in Japan, you’re late if you aren’t 10 minutes early. Not to mention that everything from trains to tours will leave predictably on the dot, with or without you.…