Overview
- The H3 launched on June 12 from Tanegashima carrying six probes, including a French commercial satellite that JAXA described as its first foreign commercial payload.
- The vehicle had been grounded after a December 2025 second-stage engine malfunction that derailed a prior mission’s trajectory and prompted a program-wide pause for fixes.
- Of seven H3 attempts since its 2024 debut, the rocket has failed twice, so the program’s reliability remains under close scrutiny despite the return to flight.
- A companion small rocket, the Epsilon S, has not flown since a November 2024 test fire, leaving Japan short of spare lift capacity while it restores H3 momentum.
- Japan’s space agency and Mitsubishi aim to reach a steady six-to-eight H3 launches per year because regular cadence is seen as essential to win commercial customers back from rivals such as SpaceX.