Statements: In Japan, the incidence of stomach cancer is very high, while that of bowel cancer is very low. But Japanese immigrate to Hawaii, this is reversed - the rate of bowel cancer increases but the rate of stomach cancer is reduced in the next generation. All this is related to nutrition - the diets of Japanese in Hawaii are different than those in Japan. Conclusions: 1. The same diet as in Hawaii should be propagated in Japan also. 2. Bowel cancer is less severe than stomach cancer.