Message of the President

-The Next NPR-

President and Representative Director Akira Yamamoto

We are deeply grateful for the special consideration you regularly give to NPR Group.

The spread of COVID-19 infections has created an unprecedented situation, and thus the prospects for the economy and for society in Japan along with the rest of the world are unclear. In these difficult times, the members of the NPR Group are striving together as one, combining our efforts to meet the demands of all of our shareholders and customers and of society as a whole, and to further raise our corporate value.

Since NPR Group was born in 1934, we have contributed to the ever-increasing motorization 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.

The automobile industry is entering a period of great change that occurs only once every 100 years. To keep up with times, we will raise our competitiveness throughout the world by removing the limitations in our operations that may become bottlenecks for total optimization of the operational system and speeding up our processes in making strategies and major decisions that stay ahead of changes in markets. With the strong technology upon which our companies stand, we continue the evolution of environmentally friendly powertrain products and strengthen new product development. Carried forward by these two mainstay businesses, we are preparing for the CASE era of Connected, Autonomous, Shared & Service, and Electric vehicles.

“The Next NPR” aims to become a company group needed by society, and to create comfortable work environment for every employee. We shall make full use of our core technologies that we have nurtured over our 80 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.

June 24, 2021
Teruo Takahashi
President and Representative Director

Company Overview

Company Overview

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 667 (2,908 with affiliated companies) (as of March,2021)

Directors, Audit and Supervisory Board Members, Operating Officers

Representative Director
Teruo Takahashi
(in charge of Internal Auditors Office)
Representative Director
Senior Managing Executive Officer
Yuji Sakamoto
(in charge of Production Control Dept., Global Procurement Dept., Tochigi Plant)
Managing Executive Officer
Masaaki Fujita
(in charge of Corporate Planning Dept., Accounting and Finance Dept.)
Managing Executive Officer
Zhongliang Yang
(in charge of Production Engineering Dept. I,
Production Engineering Dept. II, Production Engineering Dept. III,
President of NPR IWATE CO., Ltd.,
President of NPR Fukushima Works Co., Ltd.,
Chairman and General Manager of NPR ASIMCO Powdered
Metals Manufacturing (Yizheng) Co., Ltd.)
Managing Executive Officer
Nobuyasu Nara
(in charge of Corporate Management Dept.,
General Affairs Dept., Information System Dept.,
Safety and Health Promotion Dept.)
Director (Outside) Hiromi Nakazawa
Audit and Supervisory Committee Member
Hiroto Koeba
Director (Outside)
Audit and Supervisory Committee Member
Hiroki Kimura
Director (Outside)
Audit and Supervisory Committee Member
Yoshihide Hino
Executive Officer Makoto Kajiwara
(in charge of Quality Assurance Dept., Technical Planning Dept.,
Product Development Dept. I, Product Development Dept. II,)
Executive Officer Nobunori Tsuda
(General Manager of International Sales Dept.,
in charge of NRS Sales Dept., International Sales Dept.)
Executive Officer Takao Kishitani
(in charge of Business Planning Dept.,
Engineering and Sales Dept. I, Engineering and Sales Dept. II,
New Product Business Development Dept.)

Sales Record

Sales by product in 2020
Sales by product in 2020
Trend in sales (FY2016 - FY2020)
Trend in sales (FY2016 - FY2020)

Business Outline

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, Alloy cast iron camshafts, 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

Membership of main organizations

Japan Auto Parts Industries Association
Japanese Marine Equipment Association
Japan Land Engine Manufacturers Association
Japan Foundry Engineering Society
Japanese Society of Tribologists
Japan Powder Metallurgy Association
Japan Dental Materials Manufacturers Association
Japan Association of Dental Implant Suppliers

Main Banks

Shinsei Bank, Limited/ MUFG Bank, Ltd./ Sumitomo Mitsui Banking Corporation/ Saitama Resona Bank, Limited/ Development Bank of Japan Inc.

Progress of NPR

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.
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.