Honda has announced plans to test its high-differential pressure water electrolysis system on the International Space Station (ISS) in collaboration with Sierra Space and Tec-Masters. The goal is to develop a regenerative fuel cell system that can provide advanced energy storage to support human life on the Moon. This system, known as a circulative renewable energy system, is designed to produce oxygen, hydrogen, and electricity continuously, utilizing sunlight and water resources available on the Moon. By enhancing the performance of this system, Honda aims to create long-life regenerative fuel cells that can serve as a scalable, clean, and renewable energy source both in space and on Earth. During the Lunar Day, the system will use solar-generated electricity to produce hydrogen and oxygen from water. The generated oxygen will be used for astronauts to breathe during the Lunar Night, while the remaining oxygen and hydrogen will be used to generate electricity. The byproduct of this process is water, which is recycled back into the system, creating a closed-loop energy cycle. The advanced water electrolysis system developed by Honda aims to be efficient, reliable, lightweight, and compact for long-term operations on the Moon, addressing the need to reduce transportation costs in lunar development. The testing on the ISS will verify the efficiency and reliability of the system in a microgravity environment. Furthermore, Honda has established a Space Development Division in the U.S. to promote technology development and collaboration with the U.S. space industry, demonstrating the company's commitment to fostering sustainable future through innovative technology.