Japanese people are great, if your polite and don't have expectations, you will be treated nice in return... just like every other country I've ever visited.

There are some people who don't like tourists, but they will just pretend you don't exist, so you can ignore them right back.

https://www.youtube.com/watch?v=QRIklga9IBQ

This video matches my experiences in Japan, people are curious, helpful, if you have a mission and purpose the whole world is open to you. Be interesting, dig into some small fun detail, history, mission and people will pop out of the wood work.