[en] The utilization of radiation is the important part of the peaceful use of atomic energy together with nuclear power generation, and it has contributed to the improvement of the life of people and the development of economy. In Japan Atomic Energy Research Institute, Takasaki Radiation Chemistry Research Establishment is in charge of the utilization of irradiation, and Tokai Research Establishment is in charge of the production and utilization of radioisotopes. In Takasaki, the construction of the ion irradiation research facilities was completed in fiscal year 1993. The utilization of irradiation for the development of the polymers having separation function, polymer processing technology, heat resistant ceramic fibers, and environment protection, the effective utilization technology for resources and food irradiation and sterilization technologies; the basic research on dose measurement and radiation source the elementary technology of positron factory, radiation processing technology, the development of the production, weighing and others of radioisotopes, the research on the advanced utilization of radiation and so on are reported. (K.I.)