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Okuma Diamond Device Logo
Okuma Diamond Device Growth Score
77
CB Rank
28372
Heat Score
67
Ookuma Diamond Device is an advanced materials technology company that offers research and development of diamond semiconductors.
Founded
obfuscation
PrivateDebt Financing Sapporo, Hokkaido, Japan11-50 ookuma-dd.com/en
Aerospace
Nuclear
Satellite Communication
Semiconductor
Wireless
Overview

Okuma Diamond Device
Total Funding
obfuscation
Growth Score
77
Heat Score
67

Total Funding
obfuscation
Debt Financing raised
obfuscation
Growth Score77
-10 pts
in past quarter
Heat Score 67
8 pts
in past quarter

Company Performance Metrics

Score
Trend
AI Content may contain mistakes and is not legal, financial or investment advice.Learn more.
Growth Score - The measure of growth based on company activity, operational metrics, and investments
Growth Trend - The change in the growth score over the given time period
Heat Score - The measure of the market interest, media activity, and Crunchbase profile activity
Heat Trend - The change in the heat score over the given time period
Learn More >
Recent Milestones
Raised Funding Round
Jan 1, 1970
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Raised Funding Round
Jan 1, 1970
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Raised Funding Round
Jan 1, 1970
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See more interactive data and historical milestones on desktop for the best experience

About Okuma Diamond Device

CB Rank
28372
Ookuma Diamond Device is an advanced materials technology company that offers research and development of diamond semiconductors.
Founded
obfuscation
PrivateDebt Financing Sapporo, Hokkaido, Japan11-50 ookuma-dd.com/en
Aerospace
Nuclear
Satellite Communication
Semiconductor
Wireless

Funding Rounds

Debt Financing
OBF
in
obfuscation
Seed
OBF
in
obfuscation
Debt Financing
OBF
in
obfuscation

Key People

Details

Legal Name OOKUMA DIAMOND DEVICE Co., Ltd.
Also Known As 大熊ダイヤモンドデバイス
Operating Status Active
Company Type For Profit
Founders  Naohisa Hoshikawa
About the Company
Okuma Diamond Device supplies cutting-edge technologies that make diamond semiconductors vital.
Predictions & Insights

Growth Insight

See this Growth Insight
Okuma Diamond Device is
Lorem
 to be growing
Top Contributing Factors
Recently Raised Funding

Growth Prediction

See this Growth Prediction
Top Contributing Factors
Runway Speculation

Products & Services

Diamond Semiconductors for Harsh Environments
Semiconductor devices made from diamond material designed to operate in high-temperature and radioactive conditions, used for analog power control and frequency conversion.
Radiation-Tolerant Measurement Devices
Devices for radiation measurement and neutron detection in extreme environments like nuclear power plants and space.

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Financials

Company Funding

Total Funding Amount 
obfuscation
Number of Funding Rounds 4
Unlock company funding data, including rounds, dates, amounts, and investors.
Announced Date  
Transaction Name  
Number of Investors  
Money Raised  
Lead Investors  
Funding Type  
obfuscation
Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
3
obfuscation
Mizuho BankDebt Financing
obfuscation
Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
3
obfuscation
Mizuho BankDebt Financing
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Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
3
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Mizuho BankDebt Financing
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Debt Financing - Okuma Diamond Device
3
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Mizuho BankDebt Financing
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Debt Financing - Okuma Diamond Device
3
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Mizuho BankDebt Financing

Funding Rounds

Total Funding Amount 
obfuscation
Number of Funding Rounds 4
Unlock company funding data, including rounds, dates, amounts, and investors.
Announced Date  
Transaction Name  
Number of Investors  
Money Raised  
Lead Investors  
Funding Type  
obfuscation
Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
3
obfuscation
Mizuho BankDebt Financing
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Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
3
obfuscation
Mizuho BankDebt Financing
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Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
3
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Mizuho BankDebt Financing
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Debt Financing - Okuma Diamond Device
3
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Mizuho BankDebt Financing
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Debt Financing - Okuma Diamond Device
3
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Investors

Unlock company funding data, including rounds, dates, amounts, and investors.
Investor Name  
Lead Investor  
Funding Round  
Partners  
Mizuho Bank Logo
Mizuho Bank
Yes
Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
—
Mizuho Bank Logo
Mizuho Bank
Yes
Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
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Mizuho Bank Logo
Mizuho Bank
Yes
Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
—
Mizuho Bank Logo
Mizuho Bank
Yes
Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
—
Mizuho Bank Logo
Mizuho Bank
Yes
Debt Financing - Okuma Diamond Device Logo
Debt Financing - Okuma Diamond Device
—
Market Intelligence
People
View Profiles & Contacts
Headcount 11-50 Employee Profiles 2

Employee Profiles

News

News and Press

News•Jun 3, 2026
obfuscated obfuscated obfuscated obfuscated obfuscated obfuscated obfuscated obfuscated obfuscated
News•Nov 28, 2025
obfuscated obfuscated obfuscated obfuscated obfuscated obfuscated obfuscated obfuscated obfuscated
Access a complete feed of recent news and press, from product launches to leadership changes.
Technology
View Tech Report

Monthly Web Visits

1,813
11.36%
 in past month

Active Website Tech Count

3Okuma Diamond Device is actively using 3 technologies for its website, according to BuiltWith. These include Common Crawl, CommonCrawl Top 5m, and  Site Kit.

Total IP

12The intellectual property of Okuma Diamond Device includes 10 registered patents primarily in the 'Basic Electric Elements' category, according to IPqwery. Additionally, Okuma Diamond Device has registered 2 trademarks with the most popular class being 'Scientific and electric apparatus and instruments', according to IPqwery.
Sub-Organizations
Frequently Asked Questions

Where is Okuma Diamond Device's headquarters? Okuma Diamond Device is located in Sapporo, Hokkaido, Japan.Who invested in Okuma Diamond Device? Okuma Diamond Device has 15 investors including Mizuho Bank and  Aozora Corporate Investment.When was the last funding round for Okuma Diamond Device? Okuma Diamond Device closed its last funding round on
obfuscation
from a Debt Financing round.Who are Okuma Diamond Device's competitors? Alternatives and possible competitors to Okuma Diamond Device may include Mirion Technologies, Qorvo, and  Kromek.How much funding has Okuma Diamond Device raised to date? Okuma Diamond Device has raised
obfuscation
.
Who We Are
What We Do
Helpful Links
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