Message from the President

Our Goal: To be an integrated consulting firm that makes global contributions

President and CEO Ryuji Kawasaki
President and CEO Ryuji Kawasaki

This company was founded as one of the pioneering Japanese firms specializing in heat treatment, and after incorporation in 1939, it has continued to modernize, rationalize and diversify its operation as part of its efforts for steady development and implementation of new technology.

Now that globalization is rapidly progressing in every field, it is essential that we maintain flexibility towards Thailand, Malaysia, China and other emerging nations in regards to expansions, providing our customers technology support for in-house production, etc. We will continue our efforts to gain customer satisfaction as well as to make contributions to the international community.

Company Philosophy

「「Harmony with・・・」
We co-create value and bring out the best in the materials

・Harmony with Customers
 We work with our customers in breathing life and value into products

・Harmony with Future
 We continuously strive for future improvements

・Harmony with Society
 We grow through our contributions to society

・Harmony with Members
 We focus on potential of people

We work together with our customers in utilizing our sophisticated technology to create value (co-creation).
Focus is placed on the characteristics of every product material entrusted to us by our customers so that we may bring out their best traits to the fullest.
Also, we aim to maximize the potentials of every employee involved in such work so that each of us may grow to become an important human capital. It is our wish to realize and maintain harmony with our customers, the future, society and people, and continue to fulfill our social role to the best of our abilities.

Company History

April 1927 Commences operation as a pioneering heat treatment firm in the Kansai region
August 1939 Incorporated as Toyo Kinzoku Netsushori Kenkyujo
October 1960 Tatsumi Factory opens
April 1964 Neyagawa Factory opens
June 1970 Neyagawa Factory receives JIS B6911 certification
September 1973 Neyagawa Factory receives JIS B6913 certification
October 1973 Nabari Factory opens
June 1980 Main Factory receives JIS B6913 certification
December 1980 Kashiwara Factory opens
April 1981 Ono Factory opens
July 1985 Cera Hard Division opens
August 1985 Tondabayashi Factory opens
November 1989 Mie Factory opens
January 1991 Harima Factory opens
March 1991 Company name is changed to Tohken Thermo Tech Co., Ltd.
July 1995 Thai Tohken Thermo Co., Ltd, a joint firm, is established in Thailand
December 1996 Tohken (M) Sdn. Bbd., a joint firm, is established in Malaysia
May 2009 Cera Hard Division・Chubu office opens
June 2011 Tohken Thermo Suzhou Co., Ltd., a fully owned corporation, is opened in China

ISO certification

【ISO 9001 certified/registered factories】
Cera Hard Division, Tatsumi Factory, Main Factory, Ono Factory, Harima Factory, Kashiwara Factory, Tondabayashi Factory, Cera Hard Division・Chubu office,

【ISO 9002 certified/registered factories】
Neyagawa Factory, Mie Factory, Nabari Factory

【ISO 14001 certified/registered factories】
Neyagawa Factory, Cera Hard Division, Mie Factory, Cera Hard Division・Chubu office, TOHKEN (M) SDN. BHD.

【ISO TS16949 certified/registered factories】

Company Overview

Headquarters address 5-22-3 Kuwazu, Higashi sumiyoshi-ku, Osaka-shi 546-0041
Establishment August 1939
President and CEO Osamu Kawasaki
Capital 88 million yen
Number of employees 740
Business Overview
  • Heat treatment
    Hardening/tempering, normalizing/annealing, vacuum heat treatment, aluminum solution heat treatment, stainless steel solution heat treatment, austempering/ADI processing
  • Surface-hardening treatment
    Carburizing, carbonitriding, gas nitriding, gas soft-nitriding, gas sulphonitriding, induction hardening/tempering
  • Thin-Film Formation
    DLC coating (S-DLC, Me-DLC, C-DLC), PVD coating (TiN, TiCN, TiAIN, CrN), VC processing
  • Brazing
  • Shot blasting
  • Shot peening
  • Manufacture and sales of heat treatment equipment
Major customers
  • Aisin Seiki Co., Ltd.
  • Aoyama Seisakusho Co., Ltd.
  • Akebono Brake Industry Co., Ltd.
  • Ashimori Industry Co., Ltd.
  • Amatsuji Steel Ball Mfg. Co., Ltd.
  • Isuzu Motors Limited
  • Iseki & Co., Ltd.
  • Exedy Corporation
  • NTN Corporation
  • Osaka Gas Co., Ltd.
  • KYB Co., Ltd. (Sagami/Gifu)
  • Kawasaki Heavy Industries, Ltd.
  • KEPCO, the Kansai Electric Power Co.
  • Caterpillar Japan Ltd.
  • Kubota Corporation
  • NSK Ltd.
  • Kobe Steel Ltd. (Okubo/Takasago)
  • Kobelco Cranes Co., Ltd.
  • Komatsu Ltd.
  • Komatsu Utility Co., Ltd.
  • Sanyo Electric Co., Ltd.
  • Sanyo Special Steel Co., Ltd.
  • JTEKT Corporation
  • Shimano Inc.
  • JATCO Ltd.
  • Shinko Engineering Co., Ltd.
  • Suzuki Motor Corporation
  • Sumitomo Heavy Industries, Ltd.
  • Sumitomo Electric Industries, Ltd.
  • Sumitomo Nacco Materials Handling Co., Ltd.
  • Daikin Industries, Ltd.
  • Daido Kogyo Co., Ltd.
  • Daihatsu Motor Co., Ltd.
  • Daibea Co., Ltd.
  • Takata Corporation
  • Tadano Ltd.
  • Chuo Spring Co., Ltd.
  • Chubu Electric Power Co., Ltd.
  • Tsubaki Nakashima Co., Ltd.
  • Tsubakimoto Chain Co.
  • TCM Corporation
  • Denso Corporation
  • Tokyo Electric Power Company
  • Toshiba Corporation
  • Tokyo Keiki Inc.
  • Toyota Industries Corporation
  • Toyota Motor Corporation
  • Nabtesco Corporation
  • NSK Ltd.
  • Nippon Thompson Co., Ltd.
  • NHK Spring Co., Ltd.
  • Hitachi Construction Machinery Co., Ltd. (Tsuchiura Works)
  • Panasonic Corporation
  • Panasonic Electric Works Co., Ltd.
  • Hitachi, Ltd.
  • Hitachi Zosen Corporation
  • Fuji Heavy Industries Ltd.
  • Honda Motor Co., Ltd
  • Mazda Motor Corporation
  • Mitsui Engineering & Shipbuilding Co., Ltd
  • Mitsubishi Motors Corporation
  • Mitsubishi Heavy Industries, Ltd. (Sagami, Nagoya)
  • Mitsubishi Electric Corporation
  • Mori Seiki Co., Ltd.
  • Molitec Steel Co., Ltd.
  • Yamaha Motor Co., Ltd.
  • Yanmar Co., Ltd.

(Honorifics omitted/In alphabetical order)