According to the vital statistics provided by the Ministry of Health and Welfare in Japan,1 2) the death rate from cancer (especially stomach cancer) in both sexes in Shizuoka Pref. is much lower than the average for Japanese people. We further investigated this phenomenon epidemiologically and obtained the following results.3~5) (1) The death rate for cancer of all sites and stomach cancer in the midwest areas of Shizuoka Pref. where green tea is the staple product was muchlower compared with the national average in both sexes.
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Oguni et al. (1988) studied this question.