Japan's Final H-2A Rocket Launch: A New Era in Space Exploration
June 28, 2025
Japan's space program achieved a significant milestone on June 28 with the final launch of its H-2A rocket. This event marked the end of an era for a rocket that had been a reliable workhorse for the country's space missions.
Final Launch Details
The H-2A rocket lifted off from the Tanegashima Space Center, successfully deploying the GOSAT-GW satellite into orbit. This satellite, also known as Ibuki GW, is designed to monitor greenhouse gases and the water cycle. It carries advanced instruments to measure water in various forms and observe atmospheric gases.
GOSAT-GW Satellite
- Built by: Mitsubishi Electric for JAXA
- Expected Operation: Seven years
- Purpose: Monitor greenhouse gases and water cycle
H-2A Rocket Legacy
- First Launch: 2001
- Total Flights: 50
- Failure Rate: Only one failure in its history
The H-2A rocket has been crucial for Japan's space missions, including scientific research and military reconnaissance. However, its high cost and low flight rate made it less competitive in the commercial market.
Transition to H3 Rocket
The Japanese government has been planning to phase out the H-2A in favor of the newer H3 rocket, which promises higher flight rates and lower costs.
- H3 Debut: March 2023
- Initial Setback: Second stage failure to ignite
- Recent Success: Several successful launches, including one in February 2025
Busy Day in Space
The final H-2A launch was part of a busy day in space, with four orbital launches occurring within a span of less than 13 hours. This included launches by Rocket Lab and SpaceX, highlighting the increasing pace of space exploration and satellite deployment.
Looking Ahead
As Japan bids farewell to the H-2A rocket, it looks forward to the capabilities and advancements offered by the H3 rocket. This transition is a testament to Japan's commitment to innovation and progress in space technology.