Research Results Calculation of Background Lifetime Risk of Cancer Mortality in Japan Proposal of the active oxygen hypothesis Launch of a verification project for the effects of radiation hormesis Suppression of aging process (part 1) - Activation of cell function - Suppression of aging process (part 2) - Suppressing the incidence of diabetic symptom - Suppressive effects on cancer metastasis and tumor growth Approach to cancer therapy by whole body irradiation of low dose radiation Other cases of the effects of radiation hormesis Two-year history of Low Dose Radiation Research Center