Advancing Human History through
the Power of Diamond Semiconductors

HOPE
BEYOND
DISASTER

OUR STORY

A national crisis sparked
a collective resolve

In the wake of Japan’s nuclear disaster, some of the nation’s brightest minds came together to confront a historic challenge: nuclear decommissioning. This is the story of how that moment led to the founding of Ookuma Diamond Device — a company born not merely to build semiconductors, but to create the next generation of them.

OUR STORY

MISSION

Creating a next-generation semiconductor industry from Japan through the decommissioning of Fukushima Daiichi Nuclear Power Plant

Founded in the wake of the Great East Japan Earthquake, our company is driven by a mission to bring diamond semiconductors into practical use and contribute to society through their real-world deployment.

TECHNOLOGY

Celebrated for its extraordinary performance, diamond is often referred to as the ultimate semiconductor.
Ookuma Diamond Device was among the first to initiate full-scale pilot-line development to bring this technology into practical reality. Behind this effort lies over a decade of accumulated wisdom and achievement from Japan’s scientific community, forged through relentless pursuit of a singular goal: to overcome the global challenge of nuclear decommissioning.

Integration into Society Real-World Deployment
of Diamond Semiconductors

Toward practical application

Diamond semiconductors are gaining attention for their potential to solve problems that conventional materials have struggled to address.

Key fields where diamond semiconductors
can make a difference

Nuclear Decommissioning / Nuclear Power

Durable diamond semiconductors are indispensable for safer and faster nuclear decommissioning and for the maintenance and operation of nuclear power plants under extreme conditions.

Space / Defense

Diamond semiconductors enable longer, higher-resolution Earth observation and capture clearer images. They also enhance radar systems for broader, safer operations.

Next-Generation Communications

Diamond semiconductors overcome thermal limits to deliver large data over long distances, driving the realization and expansion of Beyond 5G/6G networks.

TEAM

Meet the team building the future of Japan’s semiconductor industry.

NEWS

Coming Soon...