Japan plans rocket research to launch replacement satellites quickly
In short
Japan's Defense Ministry announced October 9 that it would study rocket development to rapidly launch replacement satellites if existing ones lost function through attack, interference or failure. Reports put the research allocation at about 70 million yen.
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Japan's Defense Ministry announced October 9 that it would begin research into rocket development to strengthen transport capabilities into space. The aim is to launch replacement satellites quickly if satellites used by the Self-Defense Forces lose function through attack or interference. Tokyo Shimbun also cited equipment failure as a reason replacement launches could be needed. [ 3 , 5 ]
Defense Minister Shinjiro Koizumi said rapidly restoring lost satellite functions, including during emergencies, was an important security issue. He also expressed hope that Japan would produce a new internationally competitive system as space transport underwent major changes, according to the reports. [ 3 , 5 ]
About 70 million yen from the ministry's fiscal 2026 budget has been allocated to the research, Tokyo Shimbun reported. The ministry will seek private-sector proposals and select an operator next February, the outlet said. Asahi Shimbun reported that proposals on manufacturing and launch methods would be sought by December, with use of Japanese technology and industrial capabilities among the evaluation criteria. [ 3 , 5 ]
Yomiuri Shimbun reported that the research would examine short-term, low-cost rocket manufacturing, including possible use of 3D printers for components. It would also consider securing component supply chains, stockpiling parts and assembly methods. The outlet said truck-based, offshore and aircraft-based launches would be explored in response to a shortage of launch sites in Japan and abroad. [ 1 ]
The rockets would be designed to carry small satellites the ministry aims to produce, with functions that could become available shortly after entering orbit, Yomiuri reported. It said research would begin next February and a basic approach would be compiled by March 2028. Detailed operating methods would be considered afterward, with companies expected to develop and own the rockets. [ 1 ]
Why it matters
Defense Minister Shinjiro Koizumi said restoring satellite functions quickly was an important security issue, including in emergencies. The ministry also aims to strengthen Japan's space industry and encourage private-sector innovation.
Key facts
- The Defense Ministry announced research into rockets for rapid replacement satellite launches on October 9. [ 3 , 5 ]
- The research allocation is about 70 million yen. [ 1 , 2 , 3 ]
- Asahi reported that private companies would be asked for manufacturing and launch proposals by December. [ 5 ]
- Tokyo Shimbun reported that the ministry would choose an operator next February. [ 3 ]
Confirmed by several sources
Still unclear
- Detailed operational arrangements remain to be decided. Yomiuri reported that concrete operating methods would be considered later.