Mitsubishi Heavy puts 100億円 into PFN for defense AI

The investment formalizes a relationship that began earlier in June, when the two companies agreed to cooperate on AI for security-related equipment and systems. That earlier arrangement covered AI to be embedded in Mitsubishi Heavy's security products; the new capital commitment is intended to build a tighter research-and-development partnership rather than start from scratch.

For Mitsubishi Heavy, the stake fits a portfolio of hardware that already spans frigates, fighter jets and missiles, and it reflects a policy preference for AI built and operated inside Japan. PFN, for its part, has been funded by several large corporates, with Toyota as its largest outside shareholder and SBI Holdings also putting in roughly 100億円 on its own — the same scale as the Mitsubishi Heavy outlay, according to the article.

The near-term test is the shareholder vote planned for September, without which the deal does not close. Whether the shareholding translates into more concrete joint output appears limited on the valuation side, since the article reports the corporate value is viewed as unlikely to grow much on the back of the investment, leaving PFN's position just behind Japan's two most valuable domestic startups roughly unchanged.