Japanese are know about their tradition and respect to other countries traditions. They are respectful to other people not like korean or chinese who always shows dark side of india . Love from india and i watching your all video you are great in communication.
The reason for not touching is like sentinels island people..When outsider came nd interact, many of the indigenous people carried disease nd many killed...so that's why they don't touch, nd want to live in separated world.. It's not racism or any discrimination..its just they want to protect their people