What do Japanese people think about chastity before marriage?

This may be a bit forward, but I was curious as to how the Japanese people, who are known for their shyness, think about the whole chastity before marriage thing. Is it common? Uncommon?What do Japanese people think about chastity before marriage?
Japanese are not religious unlike most American people. Yes, it's 2009. I think no such thing existed in Japan last 30-40 years.... so I would say it's very uncommon in Japan. Most people experience sex around high school or college.What do Japanese people think about chastity before marriage?
if they are from a good family ok maybe they are good , but these times not so much ,, happenin ,, dont be fooled .. its 2009 ..