In Asia is it still common for unmarried people to live with their parents their whole life?

Question:

as in they never move out of their parents home

Answer:

Asia is a very big continent with several (48) independent countries. Very hard to say one way or another for ALL of Asia but since you posted in Japan, it is very common for a Japanese person to live with his/her parents until they are married and even then, common after for one of the children to remain the home with his/her spouse and subsequent children to take care of the parents as they get older. I can't comment with authority for other countries as I've only lived for an extended period of time in Japan.