Research Center for Energy and Environmental Materials (GREEN) will conduct world-leading research and development of energy and environmental materials for realization of Carbon Neutral Society and Society 5.0. Exploring sustainable and maximum utilization of renewable energies, we especially focus on battery/cell and hydrogen materials in the context of energy storage and transformation. In the battery/cell materials field, we will extensively investigate the materials for advanced Li-ion battery, solid-state battery, photovoltaic cell and so on, and contribute to the development of the next-generation higher-performance devices. In the hydrogen technology materials field, we will intensively study developing magnetic and superconducting materials as well as the associated systems for the magnetic refrigeration, which is crucial for efficient liquid hydrogen production, and catalytic materials for hydrogen production. Besides, to establish the fundamental knowledge and draw the guiding principle of these energy and environmental materials and systems, we enormously advance the cutting-edge techniques of advanced characterization, automated experiment, and computational/data science approaches. These studies will accelerate the development of energy and environmental materials, leading to bright future.