New ocean digital twin innovation accelerates blue carbon certification and supports seagrass conservation without the need for specialized experts.
Kawasaki, Japan, 25 November 2025 – Fujitsu has announced a major technological advancement that enables fast and highly accurate measurement of blue carbon—carbon absorbed and stored by seagrass and seaweed ecosystems. This new solution is designed to support restoration efforts, environmental monitoring, and certification processes tied to blue carbon credits, an increasingly important tool in global decarbonization strategies.
Blue carbon ecosystems, including seagrass beds, play a key role in absorbing CO2 and protecting marine biodiversity. However, traditional measurement methods require expert divers, manual assessments, and long analysis periods. Fujitsu’s new technology dramatically shortens that process, quantifying blue carbon in large coastal areas in a fraction of the time previously required.
The system demonstrated measurement accuracy over 85 percent and can quantify blue carbon across areas larger than one hectare in approximately 30 minutes, about 1/100th of the conventional timeframe. Its effectiveness has also been validated through the J-Blue Credit certification program, where it achieved a high accreditation rating of 95 percent.
Fujitsu plans to apply this technology in real-world ocean environments, partnering with Japanese municipalities and private companies to support seagrass restoration, conservation initiatives, and blue carbon certification efforts. The company also intends to expand its use to marine infrastructure inspection, including offshore wind farms, as well as environmental surveys related to coastal construction.
This development forms a key component of Fujitsu’s broader ocean digital twin research, aimed at creating digital models that simulate marine ecosystems and enable more sustainable ocean resource management. The company has set a goal of supporting businesses that align with environmental protection with economic growth by 2027.
The newly developed system combines three core capabilities:
- Underwater drone autonomous navigation technology
- Allows drones to operate stably even in strong currents
- Maintains positioning accuracy within 50 cm along designated survey routes
- Enables detailed data collection near coral reefs and complex seabeds
- Seagrass bed quantification technology
- Uses AI and marine ecology modeling to identify species and density with over 85 percent precision
- Calculates blue carbon absorption based on seagrass type and coverage
- Capable of evaluating 80 percent of Japan’s marine zones
- Seagrass bed creation simulation technology
- Uses AI and ocean science to simulate growth patterns
- Predicts environmental impacts of restoration measures
- Supports planning for biodiversity-positive conservation activities
Fujitsu believes that this technology will accelerate environmental restoration work, support coastal communities, and strengthen marine climate action initiatives. By combining digital innovation with ecological science, the company aims to contribute to nature-positive outcomes while advancing Japan’s leadership in blue carbon research and sustainable ocean management.
