I went out and did a google quick search and found that the Japanese have a much lower rate of colon cancer.

http://txtwriter.com/Onscience/Articles/coloncancer.html

here is a more interesting study where they found that Japanese in Hawaii have higher colon caner rate then Japanese in rural Japan.

http://cancerres.aacrjournals.org/cgi/content/abstract/42/3/1164