Asahi, the group


  • 1937 : Creation of the Asahi Diamond Industrial company in Tokyo (Japan)
  • 1944 : Opening of a site in Mie (Japan)
  • 1965 : Opening of the Tamagawa site (Japan)
  • 1968 : Creation of the TDC site (Taiwan)
  • 1972 : Asahi Diamond quoted on Tokyo's second Stock Exchange
  • 1976 : Opening of the Yamanashi site (Japan)
  • 1978 : Creation of Shinhan (Korea); Asahi Diamond quoted on Tokyo's first Stock Exchange
  • 1984 : Group becomes part of Triefus SA (France); Opening of second site in Mie (Japan)
  • 1989 : Opening of Chiba Tsurumai site (Japan)
  • 1990 : Acquisition of the entire shareholding of Triefus SA (France)
  • 1993 : Acquisition of shareholding of Triefus Australia (Asahi Diamond Australia)
  • 1999 : Opening of the 2nd site in Chiba, Chiba Daini (Japan)
  • 2001 : Creation of a permanent office in Thaïland; Construction of new premises in Chiba Daini (Japan)
  • 2002 : Creation of Asahi Diamond America and Shanghai; Total acquisition of shareholding of Asahi Diamond Indonesia
  • 2006 : Plant expansion at Yamanashi, Tamagawa and Mie (Japan)
  • 2013 : Acquisition of Koremura (Japon)
  • 2015 : Creation of subsidiaries Asahi Diamond Scandinavia, Asahi Diamond Mexico and Asahi Diamond Malaysia
  • 2017 : Asahi Diamond Group celebrated its 80 years of expertise and know-how


Key figures

  • N°1 for superabrasives in Japan
  • One of the world leaders
  • 13 production sites around the world
  • 2000 employees
  • 375 million USD turnover

Message from the President

« Asahi Diamond Industrial will continue on its path of developing human resources, improving technology and contributing to society.


Since its founding in 1937, our company has deepened business operations as a specialized manufacturer of diamond tools. As an independent business group engaging in a wide range of business operations in Japan and other countries, we can invest human resources, information and other business resources at our own discretion. This is our greatest strength.


As our tools boast advanced machining and grinding capabilities, excellent durability and are suitable for high-speed and precision processing, they are used for manufacturing in a wide range of areas from electronics and semiconductors to transportation equipment, machines, stones and construction. Diamond tools also contribute to reducing waste volume and cutting environmental load through less electricity consumption.


Recently, many companies have begun efforts to solve social problems through business operations to realize a sustainable society. We believe that we can contribute to solving various social problems by improving our products to upgrade our customers’ manufacturing in a wide range of areas. At a time when the speed of change is very quick, innovation does not necessarily come on a step-by-step basis. Innovation is required to skip multiple steps in many cases. Our tools are indispensable for and the key to innovation.


In order to improve our technological capabilities, we proactively cooperate with outside organizations in research and development, promote cooperation among plants, and utilize information and know-how accumulated over a long time. We thoroughly promote compliance with laws and regulations as a matter of course and make great efforts to develop human resources and convey skills to younger generations based on the belief that business infrastructure includes human growth.


Our attitude of sticking with diamonds has remained unshaken. We will continue as a group of diamond tool professionals expanding the potential of diamond tools and exploring their various uses. We will continue on our path of developing human resources, improving technology, and contributing to society. »

Kazuki Kataoka
President and Representative Director


CONTACT  : Click on the thumbnail of your choice   OR   See full list  >
Subsidiaries and factories

Asahi Diamond Industrial Co., Ltd

The New Otani Garden Court

11th floor 4-1, Kioi-cho, Chiyoda-ku, Tokyo 102-0094 Japon

Tel: +81 3 3222 6311

Fax: +81 3 3222 6305


Mie factory

7-8-1, Yumegaoka, Iga-shi , Mie 518-0131, Japon

Tel: +81 595 26 7321

Fax: +81 595 26 7272


Tamagawa factory

3-4-35, Kuji, Takatsu-ku, Kawasaki-shi, Kanagawa, 213-0032, Japon

Tel: +81 44833 6221

Fax: +81 44833 6702


Chiba Tsurumai factory

787, Tabi, Ichihara-shi, Chiba 290-0515, Japon

Tel: +81 436 88 3221

Fax: +81 436 88 3274


Chiba No.2 factory

1-35, Miharadai, Chonan-machi, Chosei-gun, Chiba 297-0143, Japon

Tel: +81 475 46 3101

Fax: +81 475 40 5221


Yamanashi Asahi Diamond Industrial Co., Ltd

800, Wakaoshinden, Tatsuoka-cho, Nirasaki-shi, Yamanashi 407-0031, Japon

Tel: +81 551-22-7501

Fax: +81 551-22-7069


Koremura Factory

365, Tokiwa, Kamakura-shi, Kanagawa 248-0022, Japan

Tel: +81 467-31-0721

Fax: +81 467-31-0763


Taiwan Asahi Diamond Industrial Co., Ltd.

248 Hwa kong St., Pa-Deh City, Tao-Yuan Hsien, Taiwan R.O.C.

Tel: +886-3-3636971

Fax: +886-3-3620709


PT. Asahi Diamond Industrial Indonesia

Jl.Jababeka Raya Blok F No.35 Cikarang Industrial Estate Bekasi 17530, Indonésie

Tel: +62 21 8936217

Fax: +62 21 8936342


Shanghai Xu Hui Diamond Industrial Co., Ltd.

Building No.7, No.1280 ,Lian Xi Road Pudong New District, Shanghai, China

Tel: +86 21 5042 6478

Fax: +86 21 5042 6468


Asahi Diamond Industrial Australia Pty., Ltd

No.81 Bassett Street, Mona Vale N.S.W. 2103, Australia

Tel: +61 2 9997 7033

Fax: +61 2 9997 8313


Asahi Diamond (Thailand) Co., Ltd.

120 Ample Tower, 5th Floor, Unit 5/3 Bangna-Trad Road, Km 4, Bangna, Bangna, Bangkok 10260, Thailand

Tel: +66 02348 3861

Fax: +66 02348 3864


Asahi Diamond Industrial Europe SAS.

47 avenue d'Orléans, CS70841 F, 28008 Chartres, France

Tel: +33 (0)2 37 24 40 40

Fax: +33 (0)2 37 24 40 99


Asahi Diamond America, Inc.

9872 Windisch Road, West Chester, Ohio 45069, U.S.A.

Tel: +1 513 759 5222

Fax: +1 513 759 2885


Shinhan Diamond Industrial Co., Ltd.

36B-10L, 610-9 Namchon-dong, Namdong-gu, Incheon, 405-100, Korea

Tel: +82 32 814 2211

Fax: +82 32 810 34 56


Asahi Diamond Industrial Germany GmbH.

Westfäliche Strasse 169 D, D- 44309 Dortmund, Deutschland

Tel: +49 231 906 200 60 /-70

Fax: +49 231 906 200 80


Asahi Diamond Industrial Malaysia SDN. BHD.

K-6-11, No2, Jalan Solaris Mon’t Kiara, 50480, Kuala Lumpur, Malaysia

Tel: +60-3-62010390

Fax: +60-3-62113836


Asahi Diamond de Mexico, S.A. de C.V.

Prolongacion Blvd. Campestre No.2502 Torre San Mateo I, Piso 2, Int.203 Fraccionamiento El Refugio Campestre Leon, Gto. C.P. 37156, Mexico

Tel: +52-477-390-9466

Fax: +52-477-390-9468


Asahi Diamond Industrial Scandinavia AB

Boställsvägen 1

702 27 Örebro, Sweden

Tel: +46 (0)19 10 00 50


Asahi Diamond, an essential partner for diamond and cBN tools.

Asahi Diamond Industrial Co., Ltd. established in 1937, celebrated its 80th anniversary in October 2017. The group is a specialized manufacturer of tools using diamonds, the hardest materials that exist in the world today, and cubic boron nitride (CBN), the second-hardest material. The powerful produced tools are used in the production processes—mainly cutting, grinding, and polishing—of a broad spectrum of sectors.

These include electronics and semiconductor, transportation, machinery, and stone and construction. The Asahi Diamond Group has a manufacturing and sales network extending from Japan to such regions as Europe, North America, Asia, and Oceania. Through this network, top-quality tools are supplied, that boost productivity of our customers in the manufacturing and construction industries.