JAXA selected Japan LEO Shachu on October 16, 2026, to develop space-station reboost technology through its Space Strategy Fund. The project concerns propulsion coordinated with the needs of low Earth orbit stations, including maintaining altitude and maneuvering to avoid debris.
The selection document identifies the company’s proposed work as development of coordinated-operation reboost technology based on LEO station needs. It names 辻田 大輔 as research representative. The published result does not specify an award amount or detailed work plan; JAXA says the project outline will be released after contract execution or a grant decision.
Space stations orbit through the thin upper atmosphere, where collisions with gas molecules gradually remove orbital energy. Periodic propulsion maneuvers replace that lost energy. NASA’s orbit tutorial explains that reboosts adjust the International Space Station’s orbit as its altitude decays.
A reboost normally adds speed along the direction of travel. That changes the orbital path and raises its altitude. New Space Economy’s explanation of ISS reboosts also describes how forces pass through the attached spacecraft and station structure, making thrust direction and structural loading part of maneuver planning.
JAXA’s program calls for high-thrust propulsion that operates autonomously in coordination with a station’s guidance, navigation, and control system. Its debris-avoidance objective involves changing the orbit of a station weighing hundreds of tonnes with thruster burns lasting several minutes. The agency uses the ISS’s approximately 420-tonne mass as a reference, rather than a specification for a selected customer station.
Japan LEO Shachu’s existing business includes commercial cargo spacecraft, a Japanese station module, and development of low-orbit applications. Mitsui established the company in July 2024. Mitsubishi Heavy Industries and Mitsubishi Electric subsequently invested in it, according to the companies’ January 2026 announcement. This gives the selected developer an existing role in spacecraft and station infrastructure.
The technology program also considers later applications beyond routine altitude maintenance. JAXA identifies propulsion for lunar and deep-space cargo vehicles or probes, along with slowing commercial stations for atmospheric reentry. These are intended extensions of the technology under development.
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