Although nuclear power is one of the indispensable energy sources to support modern life styles in developed countries, it becomes harder and harder to increase its capacity.Newspaper reported that there are numbers of evidences showing the suppression effect on cancer by the low level of radiation.It is expected for public people that the fear for radiation induced harm on health will mitigate through the explanation based on scientific evidences.Safe management of radioactive waste is one of the most serious issues to be solved.The neutron at fast reactors can eat more effectively the long lived several nuclear waste materials from light water reactor system.The key issue is to develop the fast reactor fuel cycle system technologies that are more economical, more proliferation resistant and higher breeding ratio.The Metallic Fuel Cycle is one of the options for the future fast breeder reactor and its related fuel cycle that enable to give the answer for the radioactive waste issues.The attractiveness of the metallic fuel cycle concept is briefly described.