I am convinced that the Ainu are Caucasians. Some ancient skulls found during an excavation don't show any mongoloid features. Of course as the years passed marriages between caucasian and mongols have occured.
Are you telling me that this Ainu is mongol?:http://gallery.beardcommunity.com/albums/uploads11/ainu_yasli_adam.jpg
Professor Stephen Oppenheimer states that the oldest (undisputed) Mongoloid skeleton ever found is only 10k years old.
The oldest Jomon skeleton ever found is 13k years old and was found in Japan...along with the oldest pottery ever found.