The Research Group for Advanced Theoretical Physic (ATP) has launched in 2019 in ASRC/JAEA to conduct the research of the fundamental sciences related to the atomic energy. Our missions are to support experimental researches at JAEA and to explore interdisciplinary researches with new ideas. We also form a platform to exchange new ideas, to stimulate international collaborations and to train young researchers. To achieve these aims, we welcome and invite researchers including students with variety of backgrounds. Core members interests cover theoretical physics on hadrons and nuclei, the strongly interacting systems. In addition condensed matter physicists working on spintronics join, which makes our group unique. The common basis of these physics is the quantum many body theory, which governs dynamics at wide scales from femto-world of quarks to nano-systems of condensed matters. To make direct contact with experiments, we put emphasis on reactions through which we can study various properties of many-body systems of interests. Our main activities in the theory researches are discussions and exchanging ideas. We regularly organize seminars, lectures and workshops which are open to all ASRC members. We also conduct REIMEI research to accomplish our purposes. to atomic energy.