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Pale Blue

Pale Blue is a Kashiwa, Japan propulsion startup (founded 2020, University of Tokyo spin-off) developing water-based resistojet propulsion systems for CubeSats and small satellites.

Kashiwa, Japan Est. 2020 Commercial
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Quick Facts
Country
Japan
Founded
2020
Type
commercial
Status
operational

About Pale Blue

Pale Blue is a Kashiwa, Japan propulsion startup (founded 2020, University of Tokyo spin-off) developing water-based resistojet propulsion systems for CubeSats and small satellites. The company's thrusters electrolyze water into hydrogen and oxygen on-demand, then combust them to produce thrust — or alternatively use resistive heating to vaporize water into steam for gentler maneuvering. Water is an ideal propellant for small satellites: it is non-toxic, not pressurized at room temperature, exempt from hazardous materials transport regulations, and has good volumetric density. Pale Blue has demonstrated the technology on orbit through in-space testing and has commercial customers requiring propulsion for CubeSat constellation stationkeeping and deorbit compliance. The company competes with Bradford Space's Comet thruster and Enpulsion's FEEP systems in the 6U-16U propulsion market.

Categories & Capabilities

Industry Categories

Propulsion Systems

Water Based

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Frequently asked about Pale Blue

Quick answers to the questions readers most often search for.

When was Pale Blue founded?
Pale Blue was founded in 2020 in Japan.
Where is Pale Blue headquartered?
Pale Blue is headquartered in Kashiwa, Japan.
What does Pale Blue do?
Pale Blue is a Kashiwa, Japan propulsion startup (founded 2020, University of Tokyo spin-off) developing water-based resistojet propulsion systems for CubeSats and small satellites. The company's thrusters electrolyze water into hydrogen and oxygen on-demand, then combust them to produce thrust — or alternatively use r…
Is Pale Blue a public or private company?
Pale Blue is currently a private commercial (status: operational).
What sector does Pale Blue operate in?
Pale Blue operates in propulsion.

Data Accuracy Notice: Information about Pale Blue is compiled from publicly available sources including company websites, press releases, regulatory filings, and industry reports. Data is reviewed periodically but may not reflect the most recent developments.

Last updated: June 30, 2026
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