Quality and environmental efforts

In order to provide a stable quality that meets diversifying needs,
each of our plants in Japan features various types of inspection equipment and computers.
And we take on new challenges in the development and creation of technology together with our customers in order to earn their trust.



ISO/IATF16949 All O&K plants obtained ISO/IATF certification in October 2004.

Delivering high-quality products to customers with short delivery times.
In order to meet the demands of the 21st century, we always stay one step ahead of customer needs,
and are untiring in our desire to deliver higher quality to improve customer satisfaction.
This is how O&K manages complete control over its production processes.

ISO/IEC 17025 The Osaka Test Center is an ISO/IEC 17025-certified testing laboratory.

O&K obtained accreditation under ISO/IEC 17025, the first in Japan to do so, on August 11, 1997, from an overseas certification agency.
To further improve our maintenance and management, we became accredited by the Japan Accreditation Board (JAB) on January 18, 2013.
The Accreditation No. RTL03650 means O&K provides an assured guarantee.
The Osaka Plant is installed with an atomic emission spectrometer, supporting customers nationwide.


ISO14001 In order to contribute to the creation of an environmentally-friendly,
vibrant society, all O&K plants acquired ISO 14001 international environmental standard certification in April 2000.

ISO/IEC 17025

Promotion of LED lighting (all plants)

ISO/IEC 17025

Solar panels installed on the plant roof (Osaka Plant)
Acquired date Oct. 22, 1999
Certifying organization Japan Quality Assurance Organization (JQA)
Plants certified Osaka Plant, Mizuhai Plant, Nagoya Plant, Gunma Plant
Environmental Philosophy O&K Company recognizes that the preservation of the global environment is one of the most important issues shared by mankind, and we promote business activities that take this into consideration. As our business involves the manufacture and sale of cold heading steel wire, O&K conducts environmental management activities based on the following policies:
Environmental Policy
  • 1.We always recognize the environmental aspects involved in our activities, products, and services. In addition to striving to prevent environmental pollution, we continue to improve our environmental management system.
  • 2. In addition to complying with environmental laws and regulations, ordinances, agreements, and so on related to our activities, products, and services, we set voluntary management standards as we work to preserve the environment.
  • 3.Of the environmental aspects related to our activities, products, and services, we also address the following items as given priority.
    (1)Energy conservation (effective use of fuels, reduction of defects, etc.)
    (2)Minimization of plant waste
    (3)Resource conservation (effective use of resources, equipment, etc.; reduction of defects, etc.)
    (4)Improvement challenges
  • 4. In order to realize this environmental policy, we set environmental targets, and the relevant departments and employees work toward achieving these targets.
  • 5.In addition to implementing and maintaining this environmental policy, we communicate this policy to all employees and everyone working for the sake of the company.

This environmental policy is also disclosed to our stakeholders.