Honda's R&D division announced plans to test a regenerative fuel cell system on the ISS in collaboration with Sierra Space and Tec-Masters. The system, leveraging hydrogen fuel cell technology, aims to support human life on the Moon by continuously producing oxygen, hydrogen, and electricity. During the Lunar Day, electricity generated by the sun will power the high-differential pressure water electrolysis system to produce hydrogen and oxygen from water. The system will utilize excess oxygen during the Lunar Night for astronauts to breathe, generating electricity using the remaining oxygen and hydrogen. By recycling water as the only byproduct, the system creates a closed-loop energy cycle similar to home solar systems on Earth. Honda's initiative to establish the U.S. Honda Space Development Division in 2024 highlights the commitment to technology development and collaboration with the U.S. space industry. The division aims to apply Honda's core technologies to expand human activities and development on the Lunar surface, fostering sustainability through pioneering technology and collaboration.