Synspective Sees Through Clouds

Optical satellites go blind under clouds and at night. Synspective, a Tokyo start-up founded in 2018, builds small radar satellites that do not. With 13 StriX satellites launched by September 2026, a Tokyo Stock Exchange listing and a backlog driven by Japan’s defence ministry, it has become one of the most closely watched companies in Asia’s commercial space sector.

Why radar matters

Most satellite pictures we see are optical: they work like a camera and need sunlight and a clear sky. Japan sits in a region of typhoons, monsoon rain and long winter nights in the north, so optical images often arrive too late or not at all, exactly when a disaster is unfolding.

Synthetic aperture radar (SAR) solves this. The satellite sends its own microwave pulses to the ground and measures the echo. Microwaves pass through cloud, smoke and darkness, so a SAR satellite can image the same place day or night in any weather. By comparing images taken at different times, analysts can detect changes in ground height of a few millimetres, which is useful for spotting landslides, subsidence and damaged infrastructure.

The StriX satellite

Traditional SAR satellites were large government projects weighing over a tonne. Synspective’s approach is to build them small and launch many.

• Size — each StriX weighs roughly 100 kg, small enough to fly alone on Rocket Lab’s Electron rocket.
• Deployable antenna — a folded radar antenna opens like wings after the satellite reaches orbit, which keeps launch size down while giving a large radar aperture in space.
• Revisit — a single satellite passes a location only occasionally. A constellation of dozens can revisit the same spot many times a day, which is what disaster response and security users need.

Synspective by the numbers

From pictures to answers

Raw radar images are hard to read for non-specialists. Synspective therefore sells two things: the satellite data itself, and analysis services built on top of it.

Data for governments and defence

Japan’s Ministry of Defense is building a constellation of small observation satellites to watch the seas around the country, and Synspective is one of the contractors. This contract explains most of the company’s order backlog and gives it multi-year revenue visibility that few space start-ups enjoy.

Solutions for infrastructure and disaster

• Land displacement monitoring — tracking millimetre-level ground movement around railways, roads, dams and reclaimed land.
• Flood damage assessment — mapping flooded areas within hours of a storm, even when clouds remain overhead.
• Insurance and finance — giving insurers an objective view of damage after an event.

Risks to watch

• Schedule — the constellation has grown more slowly than the original plan of about 30 satellites, and each delay pushes back revisit performance.
• Launch dependence — almost all launches so far rely on a single rocket, Electron.
• Customer concentration — defence contracts dominate the backlog, so commercial demand still has to prove itself.
• Competition — Finland’s ICEYE, US-based Capella Space and Japan’s own iQPS are all racing to build similar SAR fleets.

Why it matters for global partners

For overseas insurers, infrastructure operators and governments in cloudy, disaster-prone regions such as Southeast Asia, Synspective offers all-weather monitoring without building a satellite programme of their own. For investors, it is one of the few listed pure-play SAR companies, backed by long-term government demand. Its next milestone is to turn a defence-heavy backlog into a broad commercial data business.

Conclusion

Synspective shows how Japan’s space industry is shifting from large national projects to private companies that build fast and launch often. If it completes its constellation, a cloudy day over Asia will no longer mean a blind spot from space.