Key facts
- It has raised $28.5M; the latest was Accelerator/Incubator in Aug 2025.
- Notable investors include SMBC Venture Capital, J-Startup, Japan External Trade Organization, Spiral Capital (Tokyo), Globis Capital Partners — 18 tracked in total.
- Status: Privately Held (backing).
- ·The complete investor list — 18 names
- ·Watchlist + deal alerts for Okuma Diamond Device
- ·The full record, as it builds
Funding rounds
No funding rounds for Okuma Diamond Device are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.
About Okuma Diamond Device
Manufacturing of a diamond semiconductor designed to enable social implementation in areas that require advanced technologies. The company offers diamond semiconductors with thermal conductivity, dielectric breakdown, relative permittivity, and mobility, essential for applications such as communication satellites, radar systems, post-5G mobile phone base stations, oil exploration and power plant decommissioning their diamond semiconductors provide high-power utilization, compact size, and lightweight performance, enabling users for addressing the challenges faced by next-generation services like autonomous driving, drones, IoT, blockchain and the metaverse.
- Sector
- Information Technology
- HQ
- Sapporo, Japan
- Founded
- 2022
- Employees
- 27
- Website
- ookuma-dd.com/
- Ownership
- Privately Held (backing)
Okuma Diamond Device doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in Okuma Diamond Device shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on Okuma Diamond Device in its N-PORT filings yet. We sweep new filings monthly.