These are the 5 etiquette rules.
1) Tipping is not required in Japan, but it is expected and appreciated.
2) Never eat with your mouth open or use a straw when you drink
3) Dont remove someones chopsticks from their bowl without asking them first
4) Avoid stepping on peoples feet at social gatherings - especially with shoes that can be easily removed 5) When youre invited to someone elses house, always take off your shoes upon arrival