Sakana AI's Defense Push

Sakana AI, known for its bio-inspired generative AI, is increasingly focusing on high-stakes sectors, notably defense. The company launched an Applied Team in early 2025 to integrate its technology into foundational industries, with defense emerging as a rapid growth area.

Masaru Itoh, a Software Engineer at Sakana AI, transitioned from a decade at LINE Yahoo, where he specialized in large-scale distributed systems. His prior roles included Tech Lead for Yahoo Movies' backend and leading machine learning re-ranker teams for search engines.

From Web Giants to National Security

At LINE Yahoo, Itoh honed his skills on massive infrastructure, developing systems that supported millions of users. This experience fostered a desire to contribute to societal impact beyond commercial web services.

His interest in Sakana AI was piqued by an initial recruiter contact, but a casual meeting with CEO David Iwata revealed the company's ambitions in finance and defense. A subsequent technical challenge impressed Itoh with its thoughtful design, signaling a clear intent behind the hiring process.

The decisive factor was a conversation with Iwata, who shared the company's vision and technological edge. Sakana AI's emphasis on open-endedness, coupled with clear business progress and technical superiority, convinced Itoh of its potential for significant advancement.

Building the Future of Defense AI

Sakana AI's defense initiatives include developing proprietary tech for countering disinformation on social media, a capability also applied in a joint project with The Yomiuri Shimbun to visualize social media 'cognitive warfare'. The company also works on command and control systems designed to expedite situational awareness and decision-making for military units, integrating vast amounts of data from sources including drones.

Software engineers in this domain are tasked with creating professional tools for domain experts. Deep user understanding and workflow optimization are paramount, aiming to remove friction points in critical operations.

Development follows an agile methodology, free from rigid processes. The cycle involves direct user feedback, rapid problem identification, prioritized implementation, and iterative refinement.

Mission-Critical Engineering

The core appeal lies in contributing to Japan's national security and supporting mission-critical situations. This rare opportunity provides a profound sense of purpose.

The current tech stack is standard: Python for AI-friendly backends, TypeScript/Next.js for web UIs, and Kotlin for Android apps. Infrastructure can be cloud-based, but designs for degraded, intermittent, and disconnected (DDIL) environments require distinct approaches.

Generative AI is integral across operations, from implementation to goal setting and problem extraction, enhancing efficiency and quality.

In defense, Itoh leverages his diverse background, designing distributed systems for DDIL environments and integrating edge inference for various devices. The stakes are exceptionally high, as project outcomes directly impact the lives of Self-Defense Force personnel.

This necessitates rigorous quality assurance, with human oversight ensuring the integrity of AI-generated outputs.

Collaborative Culture in High-Stakes Development

Unlike typical divisions, Sakana AI's defense team operates with a fluid structure where all members contribute where needed, fostering a close-knit environment. This collaborative spirit allowed Itoh to integrate quickly.

Team dynamics are amicable and supportive, facilitating productive discussions despite the serious nature of the work. The company supports team lunches, encouraging cross-pollination of ideas and fostering camaraderie.

For engineers interested in defense, Itoh notes the unique fulfillment derived from contributing to national security, distinct from commercial endeavors. While prior defense knowledge isn't mandatory—experts from ministries and departments are on the team—a willingness to learn is crucial.

Sakana AI's defense efforts are poised for significant expansion. This is a pivotal moment to influence the direction of critical AI defense applications.