To the posters who keep posting up stats and making up numbers, if you can't reference a source then don't post misleading info
Just do a search in google if you want to know the real stats:
HIV Tutorial
Oral Sex and the Risk of HIV Transmission - HIV/AIDS Epi Update - May 2004 - Publications- Public Health Agency ofCanada
While wikipedia is not always accurate, it also have some useful info and links
HIV/AIDS in Japan - Wikipedia, the free encyclopedia