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Japan’s H3 rocket returns to flight with successful launch of new low-cost variant after earlier setbacks
Japan’s H3 rocket has successfully returned to flight, marking an important milestone for the country’s next-generation space program with the debut of a new lower-cost configuration designed to improve competitiveness in the global launch market.
The rocket lifted off Friday morning from the Tanegashima Space Center on a southwestern Japanese island, with its second stage reaching the intended orbit, according to Japan’s space agency during a live broadcast.
Six small satellites built by universities and other organizations were also deployed and are believed to have separated successfully.
The mission introduced the H3’s new “30 configuration,” which uses three liquid-fuel LE-9 engines and no solid rocket boosters. The design is intended to reduce launch costs and is one of several planned variants aimed at serving different customer requirements.
The successful flight marks the sixth overall success for the H3 program, which has experienced a difficult development path following two earlier failures. The rocket replaces the long-serving H-2A, which maintained an almost flawless record over its operational life.
The H3 is being developed as a more cost-efficient alternative in a global launch market increasingly dominated by commercial providers such as SpaceX, with Japan viewing reliable and affordable launch capability as a key element of both its space ambitions and national security strategy.
The program’s early development included a failed 2023 debut flight in which the second-stage engine failed to ignite, followed by another mission in which a navigation satellite failed to reach its intended orbit due to a second-stage malfunction. The system had been grounded since the most recent failure until this successful return to flight.
A further setback would have posed a significant challenge to Japan’s long-term space plans, including future deep space missions. A separate small rocket program has also faced delays following a failed test.
Program developers hope the H3 will eventually support between six and eight launches per year as it moves toward more regular commercial operations.
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