FINAL REPORT OF JAPAN ON THE FAILURE OF THE LAUNCH OF THE H3 ROCKET 8

ON 30 JULY, ACCORDING TO INO, THE MINISTRY OF EDUCATION, CULTURE AND SCIENCE OF JAPAN CONVENED A MEETING ON THE FAILURE OF THE LAUNCH OF THE “H3 ROCKET 8” LAST YEAR. THE FINAL REPORT ADOPTED BY THE CONFERENCE NOTED THAT THE FAULTS IN THE BASE OF THE ROCKET-MOUNTED SATELLITE, WHICH HAD BEEN WIDENED IN ROCKET FLIGHT AND HAD CAUSED DAMAGE TO THE BASE, HAD BEEN THE MAIN CAUSE OF LAUNCH FAILURE. THE REPORT WAS DOCUMENTED BY JAXA. IT WAS REPORTED THAT DAMAGE HAD OCCURRED TO THE BASE OF THE SATELLITE ON BOARD SHORTLY AFTER THE START OF THE SEPARATION. THE SURVEY DETERMINED THAT THE MAIN CAUSE OF THE BASE BREAK WAS THE INTERNAL DETACHMENT OF THE BASE DURING THE PRODUCTION PROCESS AND THE FURTHER WIDENING OF THE GAP UNDER THE IMPACT OF THE SEPARATION OF THE SHROUD. THE REPORT SUGGESTS THAT IN THE FUTURE, THE RISK OF STRIPPING CAN BE AVOIDED, FOR EXAMPLE, BY REFILLING RESINS OR LINKING FAST-FIXING. JAPAN LAUNCHED THE “H3 ROCKET 8” ON 22 DECEMBER 2025, WHEN THE FIRING OF THE ROCKET'S SECOND-STAGE ENGINE STOPPED EARLY, AND THE SATELLITE ON BOARD FAILED TO REACH ITS INTENDED ORBIT AND THE LAUNCH MISSION FAILED。