In brief
In a move to counter mounting threats to its space assets, Japan’s Defense Ministry is soliciting proposals for small rockets that could rapidly replace attacked or failed satellites. The initiative, funded with 70 million yen for fiscal 2026, explores 3D‑printed components and land, sea, or air launch options. Officials emphasize the need for swift space access and aim to foster domestic innovation in a growing space industry.
Kyodo News reported that the Japan Defense Ministry is inviting private companies to submit research proposals for a new class of small rockets capable of quickly launching replacement satellites, a strategy aimed at mitigating the risk of satellite attacks or malfunctions.
The initiative receives 70 million yen ($444,000) from the fiscal 2026 budget, reflecting the ministry’s commitment to accelerating space transport solutions in a volatile geopolitical environment.
Central to the project is the potential use of additive manufacturing—commonly known as 3D printing—to produce rocket parts. In plain language, 3D printing builds three‑dimensional objects layer by layer, allowing rapid prototyping and mass production with reduced costs.
Technical and strategic considerations
Officials will assess development costs, manufacturing timelines, and the feasibility of several launch modalities. Land, sea, or air platforms are all being evaluated to maximize flexibility and reduce dependency on fixed infrastructure.
According to the ministry, a contractor will be selected by February next year. The decision will be based on a detailed analysis of proposals that meet stringent technical and security criteria.
Defense Minister Shinjiro Koizumi underscored the urgency of the effort during a press conference in October.
“From a security perspective, it is critical to rapidly restore the functionality of satellites, particularly during emergencies,”he said.
Japan currently depends on overseas rockets for about half of its satellite launches. The country also operates a small constellation of satellites dedicated to target monitoring and situational awareness.
Experts warn that China and Russia are developing what they term “killer satellites,” devices that could actively attack and disable other nations’ space assets. This development intensifies the urgency for Japan to secure autonomous launch capabilities.
The ministry hopes the initiative will spur technological innovation among domestic companies and help build a competitive national space industry, a sector identified as a key growth area by Prime Minister Sanae Takaichi.
Satellites have become indispensable for global communication and precise positioning services. Their loss would have cascading effects on navigation, weather forecasting, and secure transmission of military data.
Koizumi expressed optimism about Japan’s prospects in the sector.
“The world of space transport is entering an era of great transformation. I hope a new globally competitive system will emerge from our country,”he said.
The Defence Ministry’s plan is part of a broader strategy that aligns scientific innovation with national security. By fostering domestic manufacturing capabilities and reducing reliance on foreign launch providers, Japan aims to maintain a resilient space infrastructure and counter emerging threats in an increasingly contested orbital environment.
