Do learn common words and phrases:
Hello = Kon'nichiwa
Excuse me = Sumimasen
Thank you = Arigato
Practices for customary greetings - be respectful. As with most forms of etiquette, it’s best to follow the lead of the person you’re with, or the person who is introducing you. Typically, the person of lower status bows first and more deeply than the elder; however, most Japanese people—especially the younger crowd—will not expect you to bow and will instead reach for a handshake.
You should not tip at restaurants: gratuity is included in the bill and it can feel offensive or confusing if you try to tip on top of that.
In Japan, you will not find many trash cans in public spaces. Do as the locals do and keep a plastic bag in your purse or daypack to put trash in until you see a trash can.
Public transportation in Japan is extremely efficient and can take you almost anywhere in the country with comfort and ease. Travelers can use metro trains, buses, and taxis to move between tourist areas while the bullet train (shinkansen) or planes are the best option for long-distance trips. While the trains are extremely efficient, due to the size of major cities such as Tokyo, its common for commutes to be more than 1.5 hrs.
Public transportation can get crowded, so be prepared to have your personal space bubble burst. It’s important to be quiet and put your phone on silent mode; additionally, you should not eat or drink anything while riding the train.
The Japanese population is fairly homogenous, with little ethnic and racial diversity. Beauty standards tend toward light, flawless skin, a petite figure, and a quiet personality. Travelers with darker skin may encounter stares or comments from locals that indicate some ingrained prejudices, but this is in most cases driven by curiosity or misinformation and not hate.