Space One’s Kairos rocket blew itself up 69 seconds into its flight on Thursday, March 5, 2026, denying the start-up Japan’s first all-commercial satellite launch for a third straight attempt.
The 18-metre rocket, powered by solid propellant, carried five trial satellites, among them craft for ArkEdge Space in Tokyo and for the Taiwan Space Agency. Its flight came to an automatic stop at 29 km, around 18 miles, over the Pacific.
The detail that matters is what the telemetry did not show. “No significant abnormalities were found in the flight or onboard equipment” before the self-destruction, Space One vice president Nobuhiro Sekino said at a news conference, which he framed as pointing to the rocket’s autonomous flight-termination system rather than a mechanical fault. Live footage showed Kairos flying a wobbly path within two minutes of clearing the pad at the southern tip of the Kii peninsula.
Under the hood, Space One is a venture bankrolled by Canon, IHI and Shimizu, and it had already lost two Kairos flights in 2024. The company is central to a government push to give Japan its own launch options and cut dependence on American rockets as it counters China in space.
The technical reality is stark. Japan managed just three launches in 2025, well below a goal of 30 a year in the early 2030s, and a failed December flight of the H3, the state-funded rocket made by Mitsubishi Heavy Industries, added to the pile-up. Satellite operators have mostly looked to SpaceX and Rocket Lab instead.
As ever, the failure lands as the government deepens its bet on homegrown rocketry, with subsidies to Space One and other young launchers and contracts aimed at orbiting dozens of national security satellites. Kota Umeda, a Tokyo-based research fellow focused on geoeconomics, said building a launch record quickly matters most when competing with small-rocket rivals worldwide.
Sources
- Failure to launch: Japan’s Space One aborts Kairos flight after lift-off | South China Morning Post
- Space One's third rocket failure leaves Japan without commercial launch capability | Reuters
