ISAS promotes space-engineering studies to fully realize space exploration that is more distant, more flexible and more versatile. Our efforts, incorporating an inter-university research system, cover a wide range of research fields from space transportation and astronautics to space information & systems. They encourage free conceptions and highly creative studies by researchers. Basic technological studies for satellites and spacecrafts have been applied in real missions. We also study innovative technologies such as future transportation systems and new space-energy systems.