TOCHIGI NITTO KOHKI is a key factory in the NITTO KOHKI Group that manufactures couplings “CUPLA”, which are used to connect pipes for air, gas and liquid in factories and homes, pumps for sending clean air to medical equipment and septic tanks, and medical equipment that incorporate the technology. The factory can also handle special-order production of “CUPLA” and an extensive range of products.
TOCHIGI NITTO KOHKI has a sophisticated, streamlined, coherent production system from parts processing and product assembly to the inspection of finished products. The factory is also equipped with self-developed auto assembly robots, auto inspection system and many other facilities that boast the group’s best power- and labor-saving capability.
TOCHIGI NITTO KOHKI began operation as a manufacturing factory of NITTO KOHKI in 1977. The
company demerged in 2000 to start business as current TOCHIGI NITTO KOHKI. Our key products
are couplings, “CUPLA”, and pumps mainly with linear drive system and applied products, "MEDOMER". We
also began production of “HHV CUPLA” used to supply and fuel compressed hydrogen, which is fuel for
fuel-cell vehicles that has been attracting attention recently, for the first time in Japan. In 2013,
we completed one of the group’s largest factory buildings, the seventh factory building, and added
merchandise warehouse. By building our unique production lines that cover from material processing,
inspection to shipping, we ensure that our manufacturing process is of the highest quality and
reliability to meet our clients’ needs. TOCHIGI NITTO KOHKI is committed to pursuing user- and
eco-friendly manufacturing in compliance with the law with a spirit of challenge. We will work as one
to keep growing. We appreciate your support.
Tetsuya Kuwabara
Representative Director, President
| Company Name | TOCHIGI NITTO KOHKI CO., LTD. |
|---|---|
| Representative Director, President | Tetsuya Kuwabara |
| Founded | May 1, 2000 |
| Capital | JPY 100 million |
| Number of Employees | 89 [139*] (as of the end of March 2026) *included temporary workers |
| Main Business | Production of quick connect couplings, pumps & compressors and medical equipments. |
| Major Shareholder | Nitto Kohki Co., Ltd. |
| Sales | 6.0 billion yen (as of the end of March 2026) |
|
Address (Headquarters/Factory) |
3473-2 Ujiie, Sakura-shi, Tochigi Prefecture 329-1311 |
| Company brochure | |
| Integrated Report |
| June 1977 | NITTO KOHKI began operation of Ujiie Plant (completed office, the first and second factory). |
|---|---|
| October 1978 | Completed the third factory. |
| May 1979 | Acquired the permit for production of medical equipment. |
| October 1980 | Completed the fourth factory. |
| January 1981 | Acquired certification for UL standard. |
| February 1984 | Received certification and permission for JIS mark (GAS TOUCH). |
| October 1985 | Acquired approval from The High-Pressure Gas Safety Institute of Japan (BULK CUPLA). |
| May 1990 | Completed the fifth factory. |
| November 1990 | Launched TPM activity. |
| October 1994 | Received TPM Excellent Award. |
| November 1995 | Acquired ISO9002 certification. |
| April 1997 | Transferred production of blowers for septic tanks to NITTO KOHKI INDUSTRY (THAILAND). |
| June 1997 | Completed the sixth factory. |
| October 2000 | Began operation as TOCHIGI NITTO KOHKI after company split-up. |
| November 2001 | Acquired ISO14001 certification. |
| January 2003 | Partially transferred production of CUPLA to NITTO KOHKI INDUSTRY (THAILAND). |
| November 2003 | Acquired upper-level ISO9001 certification. |
| June 2004 | Launched PI activity. |
| March 2008 | Acquired new JIS mark certification. |
| July 2009 | Absorbed and merged NITTO KOHKI LOGISTICS. |
| May 2010 | NITTO KOHKI transferred repair operation to the company. |
| October 2013 | Completed merchandise warehouse and parts warehouse. |
| December 2013 | Completed the seventh factory. |
| April 2014 | Returned repair operations to NITTO KOHKI. |
| September 2014 | Acquired ISO13485 certification. |
| May 2015 | Began production of machine tool. |
| February 2017 | Returned JIS certification with the end of production of GAS TOUCH. |
| December 2017 | Completed the office building. |
| October 2020 | Transferred production of machine tools to TOHOKU NITTO KOHKI (Former MEDOTECH). |
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Our Management Policy involves “contribution to society,” “employees’ wellbeing,” and “corporate development.”
First, we aim to contribute to society at large by developing, manufacturing, and selling creative products that meet the needs of the times based on the theme of “energy and labor-saving.”
Secondly, through our management activities, we aim for the wellbeing of our employees and their families.
Finally, we aim to develop the Company by contributing to society and realizing the wellbeing of our employees. We believe that putting this into practice is synonymous with our goal of achieving both the sustainability of society and the sustainable.
April 1, 2025
TOCHIGI NITTO KOHKI CO., LTD.
Kazunari Arai, Executive Director / Plant Manager
Nitto Kohki Group strives to contribute to society through businesses related to "energy and labor-saving."
To build a sustainable supply chain, we have established the following policies and are committed to their implementation.
To All Business Partners
Nitto Kohki Group requests that all business partners also comply with applicable laws and regulations, ensure stable supply, protect the environment, and respect human rights.
This policy applies to the procurement activities and business partners of all Nitto Kohki Group companies.
April 1, 2026
NITTO KOHKI CO., LTD.
Akinobu Ogata
Representative Director, President CEO
