Anemia in the inhabitants of the agricultural districts involves more serious problems in females than in males. Having established mass anemia screening method, the author made mass anemia screening in two districts in Chiba Prefecture and two districts in Shizuoka Prefecture in Japan, to elucidate the current status of anemia in women in the agricultural district. The results were as follows:1. In the collective anemia screening, the laboratory tests of the hemoglobin level, hema-tocrit value, specific gravity of blood and serum protein level sufficed. The determination of the hemoglobin level proved of particular importance.2. The hemoglobin levels lower than 12.Og/dl could be employed as one of the criteria for diagnosing anemia in housewives. It was found necessary to further examine the currently employed criteria for other laboratory test items (namely, hematocrit value, specific gravity of blood and serum iron) . The results obtained by the author indicated that the serum iron of less than 7Oμg/dl would be more adequate as a criterion for dia-gnosing anemia.3. The screening was made on about 600 housewives in the said agricultural districts, and the mean values of the laboratory tests performed were as follows: hemoglobin, 13.36± 1.47g/dl; specific gravity of blood, 1.0543±0.0031; hematocrit, 41.58±3.87%; serum iron, 94.48±35.85mg/dl; serum protein, 7.50±0.49g/dl.4. The incidence of the hemoglobin levels less than 12.Og/dl varied from district to district, but remained in the range from 11.4 to 25.2%.5. In the Ikawa district of Shizuoka City, anemia screening was made once a year, every year, for four years. The results revealed that the incidence of anemia in males was very low, and that it was in housewives that anemia would cause problems in the agricultural district. Analysis of the findings in the housewives in the said district elucidated that the incidence of anemia in them was related to their income or the intakes of nutrients.6. The tests of the serum iron and the iron-binding capacity of serum led to a conclusion that it was iron deficiency anemia that was found in the housewives.7. It was disclosed that the causes of iron deficiency anemia in the housewives were closely related to overworks and poor nutrition, but often associated with diseases such as anacidity and genital bleeding.8. It was further found that it would be possible to solve this problem of anemia in housewives in the agricultural district in Japan, by first discovering anemic housewives, and then giving them guidance from the standpoint of public health and approaching them from the medical standpoint. Problem for prevention of the anemia, it is, however, necessary to always give due consideration to the regional social and economic conditions .