Global sustainability is a daunting challenge for people living in new millennium. To contribute to such a global issue, we, as synthetic chemists, develop new inorganic-organic hybrid materials for energy applications. We design and synthesize new porous materials such as metal-organic frameworks (MOFs) and metal-organic polyhedral (MOPs). The porous materials are composed of coordination bond between metal and organic ligand, and the size of the pores may be adjusted through design. These materials are emerging as a new class of hybrid materials, potentially useful in many applications ranging from CO₂ storage and utilization, sensors, to catalysis. We are conducting basic research and application research to solve urgent problems that humanity needs to solve, such as environment and energy, using these porous materials.