Company Overview

Company name
Head office

NDK Inc.

3-14-7 Chuo, Chuo-ku, Sagamihara-shi, Kanagawa 252-0239, Japan

Tel: 81-42-705-5850

Representative Hirotsugu Takeuchi, President
Establishment April, 1957
Capital 119.5 million yen
Employees 200
Major Shareholders: Tokyo Small and Medium Business Investment & Consultation CO., Ltd.
NDK Employees Shareholding Group
The Bank of Tokyo-Mitsubishi UFJ, Ltd.


1957 Apr. Founded in Mitaka as an independent company from JEOL to execute HF induction heating business
1963 Apr. Introduced electron beam welding systems from JEOL and started the first electron beam welding business in Japan
1963 Sept. Osaka factory opened
1963 Dec. Hiroshima factory opened
1964 Apr. Nagoya factory opened
1973 Oct. Developed ion nitriding equipment and started marketing the equipment and offering nitriding services
1974 Feb. Sagamihara factory opened and Mitaka factory integrated there
1975 Jun. Fuchu plant opened
1986 Jul. Introduced “aperiodic generator technology” from the French company“Manufacture de Pezenes”
1987  Mar. Developed the “plasma multi furnace (PMF)” in cooperation with Daido Steel Co., Ltd.
and started marketing
1989  Aug. Introduced an plasma carburizing furnace at the Osaka factory
and started plasma carburizing business
1992 Jul. Nagoya factory No. 2 opened
1993 Dec. Began production and sale of radical nitriding systems as well as offering radical nitriding services
1994 May. Hashimoto Plant opened and Fuchu Plant integrated there
1994 Nov. Started ceramic coating business
1995 Mar. Hiroshima factory recognized as a subsidiary
1995 Aug. Began production and sale of plasma sulphonitriding systems as well as offering plasma sulphonitriding services
2001 Jun. Successful commercialization of the P-CVD NEO C process
2002 Feb. Head office moved to Sagamihara
2003 Mar. ISO9001 certification of both Nagoya factories and the Sagamihara factory
2005 Feb. ISO9001 certification of the Osaka factory
2006 Nov. Nagoya DLC Factory opened
2009 Aug. ISO14001 certification of the Sagamihara factory
2011  Apr. Nagoya DLC Factory integrated with Nagoya factory No.2
2011  May. Toyonaka factory opened
2012 Apr. Acquisition of Sanshin Iron Works
2014 Dec. Sagamihara Technology Development Center opened
2015 Jun. Introduced Flexicoat 1200 from IHI Hauzer Techno Coating B.V. and started offering DLC services.
2018 May. Nagoya factory opened (3 factories in Toyoake city combined with the conventional Nagoya factory and Nagoya factory No.2)



Head office


3-14-7 Chuo, Chuo-ku, Sagamihara-shi, Kanagawa


Sagamihara Factory


3-10-14 Miyashimo, Chuo-ku, Sagamihara-shi, Kanagawa


Nagoya Factory


12 Kakeshita, Kutsukake-cho, Toyoake-shi, Aichi


Osaka Factory


1-2-56 Nonakakita, Yodogawa-ku, Osaka-shi, Osaka


Toyonaka Factory


3-13-1 Tokura, Toyonaka-shi, Osaka