Gitai S1 Space Robot Arm — Specs & Review
Specifications
| Brand | Gitai |
|---|---|
| Model | S1 Space Robot Arm |
| Year | 2021 |
| Category | Space |
| Autonomy | semi-autonomous |
| Environment | indoor |
| Dimensions | 150cm L × 120cm H |
| Payload | 2 kg |
| Reach | 1200 mm |
| Connectivity | Ethernet, Remote Control |
| Country of origin | JP |
Key features
- ISS task demonstration 2021
- EVA replacement mission
- 1.2 metre robotic arm reach
- 2 kg payload capacity
- JAXA and NASA backed
- Commercial space startup
- $30M Series B 2023
What is it?
Gitai is a Japanese space robotics company developing autonomous robotic arms for ISS, lunar surface, and future space habitat operations — replacing high-cost astronaut EVAs.
Who is it for?
- NASA and JAXA for EVA task replacement on the ISS
- Commercial space station operators for in-space servicing and assembly
- Lunar surface mission operators needing robotic task execution
- Space agencies seeking to reduce dangerous and expensive astronaut extravehicular activities
Key specs
- Arm: 1.2 metre reach
- Payload: 2 kg
- Achievement: ISS demonstration 2021 (S1)
- Funding: $30M Series B (2023)
- Backers: JAXA, NASA, private investors
- Target: EVA replacement tasks
How it compares
Vs NASA Robonaut: Both target astronaut task assistance on the ISS. Gitai is a commercial startup bringing competitive private sector development pace; Robonaut is a long-running NASA internal programme with broader capability ambitions.
Limitations
- Early stage — demonstrated but not yet in regular ISS operation
- Space-qualified hardware development is extremely slow and costly
- 2 kg payload limits heavy assembly tasks
- Long path from ISS demonstration to operational deployment
FAQ
How much does the Gitai space robot arm cost?
Gitai's space robotics systems are available through government and commercial space programme contracts. Not commercially available off-shelf.
What does Gitai build?
Gitai develops autonomous robotic arms for use on the International Space Station and future space habitats and lunar surface missions, performing maintenance, assembly, and inspection tasks in place of astronaut EVAs.
What did Gitai achieve on the ISS?
Gitai's S1 robotic arm completed a task demonstration on the ISS in 2021, performing switch and cable operations autonomously — the first demonstration of a Japanese startup's robot on the ISS.
What problem does Gitai solve in space operations?
Gitai's robotic arms target EVA task substitution — replacing extravehicular activities that cost approximately $300 million per hour of astronaut time with autonomous or remotely operated robotic systems.
Who backs Gitai?
Gitai is backed by Japan's JAXA, NASA, and private investors. It raised $30M in Series B funding in 2023 for development of lunar surface and in-space servicing robots.