Kyowa Seiko Co., Ltd. - Local Guide Biz
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Kyowa Seiko is a manufacturing company that drives the future of the local community

Kyowa Seiko Co., Ltd. was founded in 1963 as a precision tool manufacturer in Tokyo, and is now an “Akita manufacturing company” with its head office and factory in Ugo-cho, Ogatsu-gun, Akita Prefecture. The head office and factory manufacture and sell precision cutting tools and wristwatches, and the watch manufacturing factory is located in Minase, Yuzawa City, Akita Prefecture, and there is also a sales office in Kashiwa, Kashiwa City, Chiba Prefecture.

Kyowa Seiko Co., Ltd.: Cutting tools

Cutting tool manufacturing and watch manufacturing seem to be two completely different businesses, but both are very closely related, requiring high-quality “precision.” By developing two businesses, Kyowa Seiko develops unique product manufacturing and manufacturing that can compete in the world.

Companies Driving Regional Growth

In December 2017, The company was selected by the Ministry of Economy, Trade and Industry as the “Companies Driving Regional Growth” as a regional core company that is a candidate for a regional economic driving business.

Companies Driving Regional Growth

Kyowa Seiko’s tools are widely used in various fields

Precision fine tools, CBN tools, PCD diamond tools, etc. manufactured by Kyowa Seiko Co., Ltd. are used by the mold industry and processing manufacturers, as well as lightweight smartphones, automobile engines, aircraft, medical equipment, injection needle drilling, etc. widely used in manufacturing sites.

Its technical capabilities are also utilized in watch manufacturing, and the special stepped drill used for drilling the crown part is widely used in the watch industry.

PCD point drill

PCD Point Drill
Uses PCD, which is a diamond sintered body with excellent wear resistance, as a tool material

Among them, PCD diamond tools have succeeded in sintering cemented carbide and PCD, integrating them into a spiral shape. This is a one-of-a-kind product with a blade diameter of 0.1 to 6.0 mm.

Kyowa Seiko Official Video


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Kyowa Seiko’s own brand “MINASE” Japan’s watch

MINASE, which Kyowa Seiko launched as its own brand in 2005, carries out everything from design and development to manufacturing in-house. Using Kyowa Seiko’s specialty polishing technology, especially Zaratsu polishing technology, there are only a few engineers in Japan, so MINASE is a very valuable and world-class high-quality watch in the world.

The brand name “MINASE” is a tribute to the craftsmanship and skill of the Japanese craftsmen at the atelier in Minase, Yuzawa City, Akita Prefecture.
Received the 2nd Monodzukuri Nippon Grand Award, Tohoku Bureau of Economy, Trade and Industry Director’s Award and the 2008 Tohoku Regional Invention Award, Akita Branch Manager’s Award.


It debuted at the 2019 German watch fair. The dial has a black gradation, expressing the world of Japanese ink painting.

The expression changes depending on the viewing angle, and is characterized by the complex brilliance of stacked polyhedrons.

It made its European debut in Geneva in 2018 and is now sold at two stores in Switzerland, gaining high support from overseas watch enthusiasts.

Okoshi Chu Mfg., Inc., a traditional craft Edo armor maker, announced the Armor Watch “Date Masamune” on the crowdfunding site Makuake from September 5th, the birthday of Masamune Date. It is a collaborative work of three companies: Kyowa Seiko, which makes the finest watch “MINASE” with the technology of manufacturing precision cutting tools, and Mr. Yusuke Taguchi, the designer who proposed this project. Click here for details.

MINASE Official Video


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Find these items on shops below

From April 10, 2020, only products purchased at “MINASE authorized dealers” and “MINASE authorized WEB sales sites” are eligible for the issuance of MINASE warranty. Products purchased for resale, second-hand goods, online auctions, etc. are not covered by the warranty, so please be careful when purchasing.

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