Space Seed Holdings Presents Autonomous Microalgae Culture Concept at Global Algae Summit 2026
Space Seed Holdings Inc. (Headquarters: Minato-ku, Tokyo; Representative Director and CEO: Kengo Suzuki; “SSHD”) took part in Global Algae Summit 2026, an international conference on microalgae held at Sunway University, Malaysia, on August 19, 2026. SSHD presented a poster on a concept for culturing microalgae autonomously in orbit (poster P55).
The poster described a design for running SpaceAgent, an experiment platform built around a large language model (LLM), on a 6U orbital experiment unit, a device about 6 liters in overall size.
Global Algae Summit 2026 was organized by Leave a Nest Malaysia and co-hosted by Euglena Malaysia and Sunway University under the theme “The Algae Frontier: Catalysing Value and Impact.” The conference focused on turning research and technology into practical applications and featured 62 poster presentations. SSHD also took part in 2025.
Why microalgae for space
Microalgae could support several functions in a closed habitat: fixing carbon dioxide and releasing oxygen, converting light and surplus nutrients into edible biomass, and providing feedstock for materials. During long-duration missions beyond Earth, an organism that could contribute to oxygen, food and materials would be valuable, which makes microalgae a candidate for life-support systems.
The proposed experiments would examine growth, cellular composition and stress responses during extended culture in microgravity. Opportunities for orbital experiments are limited, and each flight typically follows a fixed procedure, which makes it difficult to adjust an experiment from the ground if problems arise.
The proposed system addresses three practical challenges:
– Limited bandwidth and intermittent connectivity: uplinks to small satellites typically run at kilobits per second and are interrupted at times. These limits can make step-by-step control from the ground impractical.
– Ground procedures do not carry over: in microgravity, bubbles do not rise and gravity-fed liquid handling does not work.
– Images are cheap to take but costly to send: the design aims to select and summarize images on board so that only information needed for decisions is sent to the ground.
How SpaceAgent is designed
SpaceAgent is designed to work as an operating system for the laboratory. A single multimodal AI registers different types of experiment modules, for observation, liquid handling, environmental control and analysis, through one common interface, and uses data from all of them in a shared decision-making process. This differs from the conventional approach of writing separate rules for each module.
Modules that produce information, such as hypothesis generation, analysis and record-keeping, are registered in the same way as modules that perform physical operations. The proposed system would use operation logs alongside sensor readings to assess whether a change, such as a temporary drop in pH after medium is added, is consistent with a recent operation or requires further action.
The design has four main features:
– Combining experiment data: images, sensor readings and operation logs are assessed together, rather than against separate thresholds for each sensor.
– Choosing where decisions are made: the system switches between ground-based and onboard decision-making according to gravity conditions and the risk of communication loss.
– Checking commands: commands are checked against predefined physical limits before execution, and commands that exceed them are capped and logged, to limit the consequences of incorrect model outputs.
– Requiring approval: reversible operations can proceed autonomously, while irreversible operations require approval from the ground.
Why start with microalgae
SSHD’s autonomous experiment platform has been designed with cell experiments as one starting point. The poster explained why microalgae were chosen as the first payload, compared with animal cells. When microalgae are grown photoautotrophically, light intensity, wavelength and light-dark cycles are key control variables. These can be controlled electrically, which requires less liquid handling than pumping reagents into animal cell cultures.
Related poster (P56)
Kengo Suzuki also presented a separate poster (P56) on using AI to search public omics data for algae-derived compounds that may modulate changes in gene expression associated with spaceflight.
Patent applications
Patent applications covering core SpaceAgent technologies were filed with the Japan Patent Office on June 10, 2026:
– Japanese Patent Application No. 2026-097380: integrated control apparatus for experiment modules, covering control of different modules through one common interface, switching between ground-based and onboard decision-making, and handling information modules in the same way as physical modules
– Japanese Patent Application No. 2026-097387: integrated autonomous experiment apparatus for cell experiments, covering liquid handling in microgravity (bubble management and recovery from communication loss), liquid-feed profiles, and division of decision-making between onboard and ground systems
Both applications were filed jointly by Regenesome Inc., Space Seed Holdings Inc., IDDK Co., Ltd. and Spacenome Lab., Inc.
This announcement concerns the filing of patent applications and does not mean that patents have been granted.
Comment
Kengo Suzuki, Representative Director and CEO, Space Seed Holdings Inc.
“We want to begin with microalgae culture experiments that can run without a person on site. In orbit, communication delays and interruptions make it difficult to manage every step from the ground. We are developing SpaceAgent so that the system can make more of those decisions locally. We also see potential applications in laboratories and production facilities on Earth.”
About Space Seed Holdings Inc.
Space Seed Holdings is a space deep-tech venture builder whose mission is “Turning science fiction into nonfiction.” Its activities span investment, research and venture creation, and include the Fermentation and Longevity Fund program, which supports the practical use of fermentation and longevity technologies. Its long-term goal is to help develop the technologies needed for humans to live in space by 2040, working with partners across different fields.
