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Engine failure ruins the launch of Japan's flagship rocket, harming the country's space agenda

Japan’s H3 rocket suffered engine trouble on December 22, 2025, and failed to place a Japanese navigation satellite into ...

Japan lost a 5-ton navigation satellite when it fell off a rocket during launch

The H3 is a relatively new vehicle, with last month’s launch marking the eighth flight of Japan’s flagship rocket. The launcher falls on the medium-to-heavy section of the lift spectrum. The eighth H3 ...