TANEGASHIMA, JAPAN / RankWire.AI / – A successful launch of Japan’s H3 rocket occurred on Tuesday, carrying the Michibiki No. 7 navigation satellite into orbit. The launch, identified as H3 Flight No. 9, took place from the Tanegashima Space Center at 4:23:31 a.m. Japan time. JAXA confirmed that the rocket adhered to its planned trajectory throughout the mission. The satellite separated approximately 29 minutes after launch and entered its predetermined orbit.
Joining Japan’s Quasi-Zenith Satellite System, Michibiki No. 7, also known as QZS-7, enhances Japan’s navigation capabilities. The system functions alongside the U.S. Global Positioning System to improve positioning, navigation, and timing services. Japan started operational QZSS services in November 2018, with coverage extending across Japan and parts of the larger Asia-Oceania region.
The QZSS program is overseen by Japan’s Cabinet Office through the National Space Policy Secretariat. Originally, officials had scheduled the launch of QZS-7 for February 2026 but postponed it following an earlier failure of an H3 mission. After completing additional preparations, JAXA set a new launch date for August 10, which was delayed to August 11 due to weather conditions, ultimately resulting in a successful mission.
H3 Celebrates Another Successful Mission
This achievement follows the loss of Michibiki No. 5 during H3 Flight No. 8 in December 2025. During that mission, the rocket’s second-stage engine shut down before completing its second ignition sequence, preventing QZS-5 from reaching its target orbit. JAXA investigated the cause of this failure before resuming H3 launches with a successful test in June 2026.
H3 Flight No. 6, launched on June 12, successfully reached its intended orbit during that return-to-flight operation and deployed several small payloads as part of the test. Serving as Japan’s primary launch vehicle, the H3 replaces the long-standing H-IIA rocket family. The development of the H3 was led by Mitsubishi Heavy Industries as part of Japan’s efforts to expand its domestic launch capabilities.
Enhanced Satellite Positioning with Michibiki
Designed to bolster satellite positioning coverage while maintaining compatibility with GPS services, Japan’s QZSS utilizes satellites placed in quasi-zenith and geostationary orbits. This system supports positioning, navigation, timing, and various augmentation services within its operational region. In July, the Cabinet Office updated technical details regarding operations under a six-satellite configuration that includes QZS-7.
Japan’s plans for a seven-satellite constellation under its official satellite navigation program are ongoing. QZS-7 is a part of the network’s continued expansion. The launch on Tuesday successfully achieved its immediate objectives, placing the spacecraft into its designated orbit, marking another milestone after the H3’s return to flight in June.