Creativity that soars

Blazing new trails with plasma technology

Since our founding in 1957 with the assistance of JEOL, the leading manufacturer of electron-microscopes,

NDK has been serving the automobile and other machinery industries through induction heating and hardening techniques.  


Under the slogan “Creation and Challenge”, NDK has devoted its efforts to developing a new Ion Nitriding System in 1973, and revolutionized the field, earning accolades from around the world and earning an overwhelming market share.  


As innovation advances at a high pitch in the 21st century, new technologies are being sought in all areas of industry. NDK works to quickly grasp the needs of industry, and to offer new technologies through our R&D group exploring the physical properties of the metals, the processing group obtaining superior characteristics, and the manufacturing group providing products and systems that lead the market.

NDK will continue to fan the flames of creativity and to accumulate and improve their expertise in plasma and heat treatment technologies while staying aware of the industry trends, in order to blaze new trails in the technology and markets of tomorrow.

Management Philosophy

NDK Inc. is aiming to become one of the top companies in this market.We will always maintain our creative and challenging spirits and provide products and services centering on heat treatment while respecting human beings.



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