We are deeply grateful for the special consideration you regularly give to NPR Group.
Since NPR Group was born in 1934, we have contributed to development of the automotive industry of the world. Our main products, piston rings and valve seat inserts, are adopted by major automobile manufacturers not only in Japan but also overseas. We deeply thank our customers, shareholders, and other stakeholders for enabling us to establish a firm position in these markets.
On October 2, 2023, NPR Group have merged to establish NPR-RIKEN CORPORATION with Riken Corporation, our fellow automotive engine parts manufacturer, together with whom we have supported the world's motorization through improving each other as a competitor. From now on, the two companies will unite to combine our technology, corporate culture, and climate which we have cultivated over the years and continue to pursue innovation and take on challenges in order to achieve NPR-RIKEN's group philosophy, "Build the competencies and capabilities to sustain our present and future.
We, as a member of NPR-RIKEN Corporation group, aim to become a company group needed by society, and to create comfortable work environment for every employee. Furthermore, we shall make full use of our core technologies that we have nurtured in our 90 years of manufacturing history, thus continuing to provide new high-value-added products and contributing to the realization of a sustainable society.
I humbly request that you continue your generous support for our efforts.
President and Representative Director of Nippon Piston Ring Co., Ltd.
(President and COO of NPR-RIKEN CORPORATION)
Company Overview
| Company name | NIPPON PISTON RING CO., LTD. |
|---|---|
| Head office | 5-12-10, Honmachi-Higashi, Chuo-ku, Saitama City, Saitama, JAPAN 338-8503 |
| Phone: +81-48-856-5022 FAX: +81-48-856-5038 | |
| Date of foundation | April, 1931 |
| Date of establishment | December 20, 1934 |
| Capital | 9,839 million Japanese yen |
| Number of employees | 627 (2,578 with affiliated companies) (as of March 31,2024) |
| Shareholder | NPR-RIKEN CORPORATION 100% |
Directors, Executive Officers (as of June 21, 2024)
Representative Director
President
Teruo Takahashi
Director
Managing Executive Officer
Masaaki Fujita
Director
Managing Executive Officer
Zhongliang Yang
Auditor
Hiroto Koeba
Auditor
Nobuyasu Nara
Managing Executive Officer
Makoto Kajiwara
Managing Executive Officer
Takao Kishitani
Executive Officer
Eiichi Chiyo
Executive Officer
Hironobu Sekiya
Executive Officer
Ryosuke Hasumi
Executive Officer
Takaaki Endo
Executive Members of Business Execution
| President | Teruo Takahashi (in charge of Internal Auditors Office, DX Promotion Office) |
|---|---|
| Managing Executive Officer | Masaaki Fujita (in charge of Corporate Management Dept., General Affairs Dept., Accounting and Finance Dept.) |
| Managing Executive Officer | Zhongliang Yang (in charge of Safety & Health Dept. Manufacturing and Production Engineering Depts., Chairman and General Manager of NPR ASIMCO Powdered Metals Manufacturing (Yizheng) Co., Ltd.) |
| Managing Executive Officer | Makoto Kajiwara (in charge of Quality Assurance Dept., DX Promotion Office) |
| Managing Executive Officer | Takao Kishitani (Senior General Manager of Sales Head Office in charge of Sales Head Office, International Sales Dept., NRS Sales Dept.) |
| Executive Officer | Eiichi Chiyo (General Manager of Corporate Planning Dept., in charge of Corporate Planning Dept.) |
| Executive Officer | Hironobu Sekiya (General Manager of Affiliated Business Dept., in charge of Environmental Management Dept. Affiliated Business Dept.) |
| Executive Officer | Ryosuke Hasumi (Deputy Senior General Manager of Development Head Office, in charge of Development Head Office) |
| Executive Officer | Takaaki Endo (General Manager of DX Promotion Office, in charge of Information System Dept., Production Control Dept., Global Procurement Dept.) |
Business Outline
Main business of the NPR group is production and sale of automobile engine parts, marine engine parts and other products.
Main Products
For automobiles
Piston rings (for motorcar, for motorcycle, and other internal combustion engine use)
Valve seat inserts
Other automobile engine parts (Composite comshafts, Cylinder liners, etc)
For Marine engine and other products
Marine Piston rings, Industrial large size piston rings,
Metal injection molding parts (for Industrial equipment, for Office autmation equpment, for leisure goods, etc),
Compressor parts, Medical equipment parts (Dental implant)
Main customer (Japanese alphabetical order)
- Japanese automekers
- ISUZU Motors Ltd. / KAWASAKI Heavy Industries Ltd. / SUZUKI Motor Corporation. /
SUBARU CORPORATION / DAIHATSU Motor Co.,Ltd. / TOYOTA Motor Corporation. /
NISSAN Motor Co.,Ltd. / HINO Motors Ltd / HONDA Motor Co.,ltd. /
MAZDA Motor Corporation. / MITSUBISHI Motors Corporation. /
MITSUBISHI FUSO Truck & Bus Corporation. / YAMAHA Motor Co.,Ltd /
UD Trucks Corporation.
- Overseas automakers
- Audi AG / GENERAL Motors Company / Daimler AG / Harley-Davidson, Inc. /
Hyundai Motor Company / Ford Motor Company / Volks Wagen AG
- Japanese marine engine makers and the other
- Akasaka Diesels Ltd. / ISEKI & Co.,Ltd. / KUBOTA Corporation. /
KOMATSU Ltd. / Japan Engine Corporation / HANSHIN DIESEL WORKS.,LTD. /
Hitachi Zosen Corporation / MITSUI E&S Shipbuilding Co.,Ltd.
- Overseas marine engine makers and the other
- WÄRTSILÄ LTD. / HYUNDAI HEAVY INDUSTRIES Co.,Ltd. / MAN Energy Solutions
Membership of main organizations
- JAPIA
- Japan Auto Parts Industries Association
- JSMEA
- Japanese Marine Equipment Association
- LEMA
- Japan Land Engine Manufacturers Association
- JFS
- Japan Foundry Engineering Society
- JAST
- Japanese Society of Tribologists
- JPMA
- Japan Powder Metallurgy Association
- JDMA
- Japan Dental Materials Manufacturers Association
- JADIS
- Japan Association of Dental Implant Suppliers
Mission
Build the competencies and capabilities to sustain our present and future
Vision
Create innovation through the blending of people and technology while continuing to embrace change
Value
’Circles’ of Trust
-We will enhance corporate value by respecting our relationships with our stakeholders and by providing high-quality products and solutions.
‘Circles’ of Growth
-The company and employees will grow together by all employees recognizing and respecting each other’s values and by continuing to take on new challenges.
‘Circles’ of Social Harmony
-We will strive to solve social issues related to living conditions and the environment wherever we operate.
| 1934 | Established Nippon Piston Ring Co., Ltd. Opened Kawaguchi Plant. |
|---|---|
| 1939 | Opened Yono Plant. |
| 1949 | Listed on the Tokyo Stock Exchanges. |
| 1964 | Established Nippon Ring Service Co., Ltd. |
| 1971 | Developed special sintered alloy valve seat inserts for unleaded gasoline. |
| 1973 | Established Schöttle Motorenteile GmbH in West Germany. |
| Established NPR of America, Inc. in U.S.A. | |
| 1982 | Established NPR FUKUSHIMA WORKS CO., LTD. |
| Established NPR Kawaguchi Works Co., Ltd. | |
| Established NPR Distribution Center Co., Ltd. | |
| 1983 | Established NPR Imanishi Works Co., Ltd. |
| 1984 | Transferred Kawaguchi Plant. Opened Tochigi Plant. |
| 1985 | Developed assembled sintered camshafts. |
| 1986 | Opened NPR of America, Inc. Detroit Sales Office. |
| 1988 | Changed fiscal year-end from November 31 to March 31. |
| 1989 | Opened Nogi Branch Plant of Yono Plant (currently Nogi Branch Plant of Tochigi Plant). |
| 1990 | Established NPR IWATE CO., Ltd. |
| 1996 | Acquired stocks of IP Rings Ltd. in India. |
| 1997 | Established Siam NPR Co., Ltd. in Thailand. |
| 1998 | Transferred the headquarters to Yono city (currently Saitama city), Saitama prefecture. |
| 1999 | Established NPR of Europe GmbH. in Germany. |
| 2000 | Established PT. Nippon Piston Ring Indonesia (currently PT. NT PISTON RING INDONESIA) in Indonesia. |
| 2001 | Converted Siam NPR Co., Ltd. into a wholly-owned subsidiary. |
| 2002 | Opened NPR IWATE CO., Ltd. Ichinoseki Plant. |
| 2003 | Closed Yono Plant. |
| 2004 | Established NPR Manufacturing Michigan, Inc. in the U.S.A. |
| Converted NPR Imanishi Works Co., Ltd. into a wholly-owned subsidiary, and changed the company name to NPR Shimane Co., Ltd. | |
| 2005 | Merged Schöttle Motorenteile GmbH. with NPR of Europe GmbH. |
| Established NPR Auto Parts Manufacturing (Yizheng) Co., Ltd. in China. | |
| Established NPR SINGAPORE PTE. LTD. in Singapore. | |
| Opened sales office in Korea. | |
| 2006 | Established PT. NPR MANUFACTURING INDONESIA in Indonesia. |
| Established NPR Auto Parts Manufacturing (Zhenjiang) Co., Ltd. in China. | |
| Established NPR Manufacturing Kentucky, LLC. in U.S.A. | |
| Established NPR US Holdings, Inc. in U.S.A. | |
| 2007 | NPR SINGAPORE PTE. LTD. acquired Eagle Automotive Pte. Ltd. in Singapore and E.A. Associates Sdn. Bhd. in Malaysia. |
| 2011 | NPR US Holdings, Inc. absorbed and merged NPR of America Inc., NPR Manufacturing Michigan, LLC. and NPR Manufacturing Kentucky, LLC. Changed the company name to NPR of America, Inc. after the merger. |
| Transferred all holding stocks of NPR Shimane Co., Ltd. | |
| Established NPR AUTO PARTS MANUFACTURING INDIA PRIVATE LIMITED in India. | |
| 2012 | Absorbed and merged NPR Kawaguchi Works Co., Ltd. and NPR Distribution Center Co., Ltd. |
| NPR Auto Parts Manufacturing (Yizheng) Co., Ltd. absorbed and merged NPR Auto Parts Manufacturing (Zhenjiang) Co., Ltd. | |
| Established NPR Powdered Metals Manufacturing (Yizheng) Co., Ltd. in China. | |
| 2013 | Converted PT. NT PISTON RING INDONESIA into a wholly-owned subsidiary. |
| Transferred 50% of shares of NPR Powdered Metals Manufacturing (Yizheng) Co., Ltd. to Yizheng Shuanghuan Piston Ring Co., Ltd. (currently ASIMCO Shuanghuan Piston Ring (Yizheng) Co., Ltd.). Changed the company name to NPR ASIMCO Powdered Metals Manufacturing (Yizheng) Co., Ltd. | |
| 2014 | Acquired the business of metal injection molding from Sumitomo Metal Mining Co., Ltd. |
| Acquired the business of dental implant from ISHIFUKU Metal Industry Co., Ltd. | |
| 2015 | Established Dental Implant Medical Device Center in Tochigi Plant. |
| 2018 | Transferred partial shares of NPR of Europe GmbH. to Daido Metal Co., Ltd. |
| 2021 | Absorbed and merged Nippon Ring Service Co., Ltd. and NPR Business Service Co., Ltd. |
| 2022 | Acquired all shares of Normeca Asia Co., Ltd., making it a subsidiary. |
| 2023 | Nippon Piston Ring Co., Ltd. and RIKEN CORPORATION have merged to establish NPR-RIKEN CORPORATION |
