[en] This is the data on dietary materials and human teeth reported by National Institute of Radiological Sciences in November, 1992. The collection and pretreatment of samples, the preparation of samples for analysis, the separation of Sr-90 and Cs-137, the determination of stable Sr, Ca and K, and counting are reported. The results of Sr-90 and Cs-137 in total diet, in rice in producing districts and consuming districts, in milk in producing districts for domestic program and WHO program and in consuming districts and in powdered milk, in vegetables in producing districts and consuming districts, in Japanese tea, in sea fish, in freshwater fish, in shellfish, in seaweeds, and in pine needles are given. Also the change of these data from 1987 to 1991 in some selected districts is shown in figures. As for the annual change in the level of Sr-90 in Japanese third molars, the objective of the survey, the materials, the methods, and the results are reported. (K.I.)