Nuclear fuel recycling is a promising option to resolve current issues of energy security and nuclear wastes. We propose selective precipitation of nuclear fuel materials such as U, Th, and Pu as an alternative principle of the nuclear fuel recycling method, so-called “NUclear fuel MAterials selective Precipitation (NUMAP)” method. In this international collaboration, we work for U and Th in TokyoTech, Japan, while will perform chemical experiments even for Pu in the dedicated control area at HZDR, Germany. Note that mg-scale experiments for Pu are quite difficult or nearly impossible in Japan. We are going to understand the fundamental coordination chemistry of these actinide elements in more depth, and to demonstrate applicability of our NUMAP method to various nuclear energy systems.