We focus on research related to combustion, energy, and thermal–fluid sciences. Our work is mainly experimental, though numerical analysis has become increasingly common in recent years. A representative topic is investigating the combustion characteristics of green propellants for spacecraft thrusters. To develop safer and higher-performance alternatives, we perform detailed experiments with new propellants and collect data essential for practical implementation. We also study the safe and efficient use of hydrogen, the fuel conversion and characterization of diverse biomass resources, and advanced pump technologies for future space transportation systems.