根据日本厚生省对产茶地区(长期经常喝茶)和非产茶地区(不喝茶或偶尔喝茶)人群中总癌发病率的对比调查结果表明:产茶地区人群总癌发病率(男性54.0/10万;女性51.4/10万)为非产茶地区人群总癌发病率(男性111.5/10万;女性101.0/10万)的1/2。其中,产茶地区人群中的胃癌发病率(男性20.7/10万;女性18.2/10万),低于非产茶地 According to the survey conducted by the Ministry of Health, Labor and Welfare on the incidence of total cancer in the tea-producing areas (long-term regular drinking) and non-tea producing areas (no tea or occasional tea), the overall incidence of cancer in the tea-producing areas is 54.0 / 100000; women 51.4 / 100000) is the incidence of total cancer in non-tea producing areas (111.5 / 100,000 males and 101.0 / 100000 females). Among them, the incidence of gastric cancer in the tea producing areas (20.7 per 100,000 men and 18.2 per 100 women) was lower than that of non-producing tea land