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Company Profile

Company name Shinkoh Manufacturing Co., Ltd.
Foundation February 1963
Establishment September 1967
Capital 30 million yen
Number of employees Overall 80 (Tokyo: 40, Tochigi: 40)
Representative Masanori Tsunoda
Business Description Cutting and processing of Plastic products/ Manufacturing of insulation parts for various connectors and telecommunication equipment
Address Head office & Factory : 5-11-1 Ebara, Shinagawa-ku, Tokyo, 142-0063 Japan
Tokyo Factory No2 : 5-6-7, Ebara, Shinagawa-ku, Tokyo, 142-0063 Japan
Nasu Factory : 28-5, Higashihara, Nasushiobara-shi, Tochigi, 325-0034 Japan
Affiliated Banks Shiba Shinkin Bank, Fudomae Branch
Sumitomo Mitsui Banking Corporation, Senzoku Branch
Shoko Chukin Bank, Tokyo Branch
Meguro Shinkin Bank, Nishikoyama Branch
Main Business Partners DDK LTD.
Flowell Corporation
Stack Electronics Co., Ltd.
NSK Micro Precision Co., Ltd.
Mito Seiko Corporation
Hokuriku Yuuki Industry Co., Ltd.
Others Medical equipment manufacturers, automobile manufacturers, etc.
Subsidiary Kyoshin Ernest Co., Ltd. (100% owned subsidiary)

Management Philosophy


  1. We strive to provide high-quality products and become a company trusted by our customers.
  2. Aim to create a company that all employees can be proud of.

Essential Values

  1. Our company values the spirit of harmony among all employees.
  2. We are always ready to take on any challenge.
  3. We are committed to corporate ethics and compliance.

Practices and rules

  1. Thoroughly implement basic actions (greeting, reporting, communicating, organizing, tidying, and cleaning).
  2. Promote mutual trust among employees.
  3. Always be attentive and strive to create a cheerful working environment.
  4. Pursue the development of technical skills and abilities.
  5. Make sure that the personnel system is fair and impartial in its evaluation and treatment of employees.

Company History

February 1963 Nobuo Tsunoda founded the company Tsunoda Manufacturing in 4-chome, Nishigotanda, Shinagawa-ku, Tokyo.
April 1965 Factory moved to 2-chome, Higashiyukigaya, Ota-ku, Tokyo.
September 1967 Established as a limited company and changed its name to Shinkoh Manufacturing.
March 1970 Relocated to 5-6-7, Shinagawa-ku, Tokyo (currently Tokyo Factory No.2)
December 1982 Capital increased to 5 million yen.
June 1990 Head office moved to new building.
September 1991 Acquired current Tokyo Factory through M&A and started operation.
April 1996 Kyoshin Ernest Co., Ltd. was spun off from the Tokyo Factory.
September 1998 Reorganized to a stock company and increased capital to 10 million yen.
April 2001 Nasu Factory established and started operation.
April 2004 Capital increased to 30 million yen.
November 2010 Masanori Tsunoda was appointed as Representative Director.
October 2014 Expanded Nasu Factory’s building and started operation.
December 2015 Kyoshin Ernest Co., Ltd. becomes a wholly owned subsidiary.
December 2016 Commended by the tax office as an excellent tax filing corporation.
May 2022 Contract a new office and factory and Relocated to 5-11-1, Shinagawa-ku, Tokyo.


By Train From Meguro Station on the JR Yamanote Line, get off at Nishikoyama Station on the Tokyu Meguro Line, and walk for 8 minutes.
By Car From Nakahara Kaido Road, in the direction to Gotanda.
Turn left at the traffic light (Jyonan Shinyoh Kinko) and turn right at the cross roard with day-care facility, we are located on the right side.
By train 15 minutes by car from JR station Nasu Shiobara (Tohoku Shinkansen, Tohoku Main Line)
By Car 15 minutes from the Kuroiso/Itamuro interchange on the Tohoku Expressway