Blood Type is Everything in Japan

Concerning the Japanese placing so much importance and belief on blood type determining one's personality and potential, I'd be willing to bet more Buraku have O blood type than say the Samurai class. I wonder if that kind of information is available anywhere. Based on this information: http://anthro.palomar.edu/vary/vary_3.htm, I bet my assumption is correct in that the gaijin (non-Japanese) blood that defined much of who was labeled Buraku has a higher chance of being type O. But isn't it funny how seemingly correlative convictions can contridict and create hippocrits of the believers and their science?

N-
Type O Savant