We are working on creating “molecular systems chemistry” that enables the conversion and amplification of solar energy and other forms of light energy. Currently, we are funded by the Grant-in-Aid for Scientific Research (S) “Development of Molecular Systematization Technology for Advanced Utilization of Photoenergy,” and developing self-assembled photon upconversion ( Photon Upconversion) materials, self-assembled singlet fission (photon amplification) materials, and supramolecular storage technologies of sunlight (Molecular Solar Thermal Fuel, Molecular STFs). We hope to contribute to the scientific communities and the happiness and prosperity of humankind – through the chemistry of molecular systems and the creation of new materials that demonstrate valuable functions.