Eightnot Raises ¥450M Series A Led by ITOCHU Technology Ventures for Autonomous Marine Navigation

Eightnot Secures ¥450 Million Series A

Eightnot (エイトノット), the Osaka-based maritime-technology company behind the AI CAPTAIN autonomous navigation platform, has raised a ¥450 million Series A round. The round was led by ITOCHU Technology Ventures, with participation from NCB Venture Capital, Nissay Capital, Ikeda Senshu Capital, and QB Capital (QBキャピタル合同会社).

What Eightnot Does

Founded in 2021 and headquartered in Osaka, Eightnot develops autonomous navigation systems for small vessels. Its flagship platform, AI CAPTAIN, is designed as a retrofit: it installs onto existing boats rather than requiring newbuilds, giving operators a path to autonomy without replacing their fleets.

The system provides:

• Real-time situational awareness
• Self-localization
• Route generation
• Collision avoidance

A modular version of the platform allows marine-equipment makers to embed the same functions directly into their own products, opening a channel beyond direct vessel retrofits.

Deployment and Validation

AI CAPTAIN has been deployed on vessels operating in the Seto Inland Sea, one of Japan's busiest and most navigationally complex waterways. The company has also demonstrated the system autonomously in the Port of Tokyo.

Those deployments matter for the acquisition and partnership case: they show the technology operating in real commercial marine environments, not only in controlled trials.

Where the Money Goes

According to the company's stated direction, the focus now is productization with marine-equipment makers and geographic expansion into North America and Southeast Asia.

The modular strategy is central to that push. By licensing or embedding AI CAPTAIN functions into equipment manufacturers' products, Eightnot can reach vessel operators through established marine supply chains rather than building a direct sales motion in every market.

Why This Round Matters

The Series A brings together a corporate venture arm in ITOCHU Technology Ventures with a group of Japanese financial and regional investors, including NCB Venture Capital, Nissay Capital, Ikeda Senshu Capital, and QB Capital. For a company at the intersection of autonomy software and marine hardware, that mix supports both continued product development and the commercial relationships needed to scale.

The Market Context

Small-vessel autonomy is a distinct segment from the large-scale autonomous shipping programs that have drawn attention in recent years. Eightnot's bet is that retrofitting the existing small-vessel fleet — fishing, workboats, and similar craft — is a faster route to adoption than waiting for new autonomous vessels to be built.

With deployments in the Seto Inland Sea and a demonstration in the Port of Tokyo already in hand, the company enters its next phase with a defined productization path and two target regions for expansion.

Key Facts

• Company: Eightnot (エイトノット)
• Founded: 2021
• Headquarters: Osaka, Japan
• Round: Series A
• Amount: ¥450 million
• Lead investor: ITOCHU Technology Ventures
• Additional investors: NCB Venture Capital, Nissay Capital, Ikeda Senshu Capital, QB Capital
• Flagship product: AI CAPTAIN
• Focus: Productization with marine-equipment makers; expansion into North America and Southeast Asia