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Tokyo Ohka Kogyo
Tokyo Ohka Kogyo develops and manufactures materials and technology for the semiconductor industry.
Tokyo Ohka Kogyo
Tokyo Ohka Kogyo develops and manufactures materials and technology for the semiconductor industry. Its products include photoresist materials and other semiconductor fabrication essentials. Founded in 1940, the company is based in Kawasaki, Japan.
General information
Firm type
Asset Manager
Year founded
—
AUM
Undisclosed
Location
Region
North America
Country
Japan
City
Yokohama
Corporate office
Yokohama, Japan
Additional offices
Santa Clara, United States · Seoul, South Korea · Paris, France
Sector focus
Frequently asked questions
What are Tokyo Ohka Kogyo's core technologies?
TOK specializes in two core technologies: microfabrication and ultra-purification. These underpin its production of photoresists, anti-reflective coatings, developers, etching gases, and cleaning chemicals for semiconductor manufacturing (per the firm's website).
Who are Tokyo Ohka Kogyo's primary customers?
TOK's customers include leading global semiconductor foundries and memory manufacturers, though specific company names are not always publicly listed. The company serves clients in Japan, South Korea, Taiwan, the US, and Europe (per the firm's website).
Is Tokyo Ohka Kogyo publicly traded or privately held?
TOK is listed on the Tokyo Stock Exchange. It reports financial data quarterly and discloses some operational metrics via its investor relations section (per the firm's website).
What regions does Tokyo Ohka Kogyo operate in?
TOK has offices in Yokohama (HQ), Santa Clara, Seoul, and Paris. Its manufacturing and R&D are primarily in Japan, with technical support centers in other regions (per the firm's website).
What is Tokyo Ohka Kogyo's role in the semiconductor supply chain?
TOK supplies high-purity chemicals used in photolithography and etching processes, critical for producing advanced semiconductor nodes. Its materials enable nanometer-scale circuit patterns. Qualification cycles for new suppliers are long, creating high switching costs for chipmakers.
Has Tokyo Ohka Kogyo received any recent sustainability recognition?
In May 2026, TOK was selected for the SX Brand 2026 by Japan's Ministry of Economy, Trade and Industry and the Tokyo Stock Exchange, highlighting its sustainability governance (per the firm, May 2026).
How many employees does Tokyo Ohka Kogyo have?
TOK employs several thousand people globally, according to its corporate profile. Exact figures are not publicly broken down by region or function.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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