Research We focus on the development of the technology for renewable energy production and high-efficiency energy conversion/utilization. 1. High-efficiency, low-cost solar cells We explore novel photovoltaic materials systems, low-cost mass production schemes, higher-efficiency device operation principles and structures for the realization of wide use of solar cells. 2. High-performance hydrogen storage systems We introduce novel engineering techniques to improve the existing hydrogen-storage systems via a series of hydrogen dynamics modelling. 3. Ultralow-power-consumption photonic LSI We design and fabricate nanostructured light sources for use in photonic integrated circuitries for the realization of ultralow-power-consumption computation and telecommunication, accounting for the production feasibility and device performance. 4. Nanomaterials engineering for nuclear-fusion electric generation We study nuclear fusion reactor materials, particle and thermal cycles with particular interest in nanomaterials, surfaces and interfaces towards practical electric generation. 5. Environmental information engine nanodevices We conduct fundamental investigations for nanoscale energy transducers to extract environmental order or information as new energy resources to be converted into electrical works.