Company Brochure


Thank you very much for visiting the Pretech N website.
Since our founding in 1916, our company has been doing business in Nagaoka, an iron producing town. After many years of experience, we have cultivated knowledge of the production and management of outstanding precision processing technology and accurate various products.
Satisfaction of accuracy and quality required by customers and meeting promised delivery deadlines. It is our strength and our pride.

N in the company name of Pretech N is taken from the first letter of NEW. Challenges of new technologies, development of new frontiers, and acquisition of new relations are the themes of our manufacturing company. Today, I would like to express my sincere gratitude for the new relationships with everyone who visits our website.
We look forward to working with you in the future.

Thank you for reading
Representative Director Hiroaki Nagai

Company Profile

Name of Representative Hiroaki Nagai, Representative Director
Head office location 221-28 Seiryo machi, Nagaoka City, Niigata Prefecture 〒940-2045
Capital 49,700 thousand yen
Founded 1916
Number of employees 57


  • April 1916

    Established Nagai Iron Works, a private business

  • August 1945

    Factory destroyed due to war damage

  • October 1945

    Factory reconstruction

  • April 1953

    Reorganized as Nagai Iron Works, with capital of 400,000 yen

  • May 1974

    Factory moved to Koshoji machi, Nagaoka city

  • June 1978

    Increased capital to 50.4 million yen

  • August 1980

    Completed second factory on site

  • February 1984

    Reduced capital to 4,970 thousand yen

  • Jan 1988

    Changed the company name to Limited company Pretech N

  • September 1991

    Reorganized as Pretech N Co., Ltd. Head office factory moved to current location

  • July 2001

    Completed second factory on site

  • May 2006

    Completed third factory on site

  • January 2008

    Acquired ISO14001 certification

  • November 2009

    Acquired ISO9001 certification

  • April 2016

    Celebrated its 100th anniversary

  • October 2016

    Ceremony for the 100th anniversary of founding

  • April 2018

    Hiroaki Nagai assumed the position of Representative Director