The trend of decarbonization is accelerating globally toward a sustainable global environment. Japan declared that it aims to achieve carbon neutrality by 2050, and electricity storage has become an important technology in the conversion to non-fossil energy and the spread of renewable energy. In this session, we will focus on secondary batteries, which are expected to make a significant contribution to decarbonization. The latest technological trends and prospects, material development, process development, recycling technology, and developments in the automobile industry will be introduced.