Japan's H3 Rocket Failure Clouds Future of Michibiki Satellite Program

December 22, 2025
Japan's H3 Rocket Failure Clouds Future of Michibiki Satellite Program
  • The report comes from Aerospace & Defense Industries via Nikkei, with broader context on Japan’s space program.

  • Breaking: Japan's space agency says the H3 rocket failed to place Michibiki 5 into its planned orbit, marking a setback after a troubled 2023 debut and six prior successful flights.

  • A government task force has been formed to investigate the anomaly and determine the next steps for the QZSS program.

  • Michibiki operates as Japan's Quasi-Zenith Satellite System, designed to improve location data for consumer services and to provide critical information during disasters.

  • The failure casts doubt on the project’s reliability and its competitiveness in the global market.

  • At this stage it’s unclear whether Michibiki-5 separated or where it ended up, prompting the task force to restore credibility.

  • Michibiki is designed to provide high-visibility coverage by transmitting signals from near-zenith positions, reducing terrain and building interference.

  • Officials apologized, and the science ministry pledged a full investigation into the causes of the failure.

  • QZSS functions alongside foreign navigation networks and can issue evacuation orders during tsunamis or heavy rainfall.

  • JAXA intends a total of 11 geolocation satellites to ensure redundancy and broaden coverage, with a seven-orbiter plan to keep at least one satellite above Japan.

  • ISRO’s countdown to a Christmas Eve LVM3/M6 mission from AST SpaceMobile underscores ongoing regional space activity.

  • QZSS aims to expand its user base across Asia-Oceania as deployment progresses.

Summary based on 27 sources


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