I get PM's often saying
I am going to Japan - what do I need to know?
Also many other questions about cultural stuff and etiquette and so on when coming to Japan.

Firstly, the people are kind and will do their best to help you, and the place is safe, so there isn't anything you 'need' to know to come here BUT there is quite a bit to know to help avoid embarrassing yourself! (and to make it easier for yourself!)
Etiquette and manners are ALL IMPORTANT!

In the big cities it is possible to find people who speak English but outside the cities it is less likely if not rare.

Public transport in Japan is extremely clean and efficient and economical.