Ookuma Diamond Device

Ookuma Diamond Device develops diamond semiconductor devices and related manufacturing technology to commercialize diamond-based electronic components. It leverages unique expertise gained from work related to the Fukushima Daiichi Nuclear Power Station accident to produce radiation‑tolerant, high‑performance components for decommissioning, satellite communications, and next‑generation high‑speed networks. The company participates in Japan’s METI J‑Startup program and focuses on bringing diamond semiconductor solutions into real-world industrial and aerospace applications.