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​Company Profile

Top Message

Greetings from the president


We continue to strive for a bright future by applying our passion to each and every process.

Since our founding, we have been dedicated to polishing and grinding of cemented carbide tools.

Carbide materials created with Ogya are used in a wide variety of tools, starting in Japan and spreading around the world.We perform the initial polishing and grinding processing of products. We are a company that values the first step and continues to take on the challenge of a bright future by sincerely applying passion to each and every process.

Representative Director Kazunobu Yamamoto

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January 1967

Former representative director Takashi Ueda establishes Keiyo Metal Shokai as an exclusive distributor of Tokyo Tungsten Co., Ltd.'s Totanloy products.

December 1969

The company was reorganized into a corporation and Keiyo Special Tools Co., Ltd. was established at the same time.

January 1970

Established a manufacturing department to handle increasing orders for cemented carbide tools.

August 1981 (Showa 56)

Aiming for modern management, we acquired a factory site, and upon completion of the installation of state-of-the-art machinery, we moved the head office factory to its current location and began operations.

October 1992

​New company building added to expand production

March 2005

​Tokyo Shinkin Bank Shinkin Council Federation Special Encouragement Award​

October 2011

​ Representative Director Kazunobu Yamamoto appointed

February 2018 (Heisei 30)

Strengthening production system and quality control​

Added 3 centerless grinders

Added one roundness measuring machine

Added one surface roughness measuring machine

September 2023 (Reiwa 5)

​Katsushika brand certification


​Company Profile

​Company name

Keiyo Special Tools Co., Ltd.


Representative Director Kazunobu Yamamoto



4-3-5 Nishishinkoiwa, Katsushika-ku, Tokyo

TEL. 03-3692-3523

FAX. 03-3696-0277


December 1969


15 million yen

number of employees

17 people

Major trading partners

Dijet Kogyo Co., Ltd.

Tungaloy Co., Ltd.

Makotroi Industries Co., Ltd.

Three other major domestic carbide tool manufacturers

​Several major domestic industrial knife manufacturers

Several carbide tool processing companies


Komatsugawa Shinkin Bank

Mitsubishi UFJ Bank

Kiraboshi Bank


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