Message of the President

Improve corporate value through “manufacturing that adapts well to change”
~Establish the foundation for Nippon Piston Ring to prosper for 100 years, through marketing and innovation~

President and Representative Director Akira Yamamoto

Last year's world economy was uncertain, with a continuing decline in economic growth rate due to the trade friction between the U.S. and China. The Japanese economy maintained a moderate recovery trend on the back of improvements in employment and income environment, despite weakening in exports.

In this year, high uncertainty in economic environment is likely to continue due to the protectionist policies and unpredictable financial market trends in foreign countries. Under such conditions, we will strive to improve profitability by expanding our sales activities in response to the market trends and the needs of our customers quickly and by strongly promoting cost reduction through innovative manufacturing.

In order for the NPR Group's sustainable growth, in our seventh mid-term business plan, which will end in fiscal 2020, under the basic policy, Improve corporate value through “manufacturing that adapts well to change” ~Establish the foundation for Nippon Piston Ring to prosper for 100 years, through marketing and innovation~, we are implementing the following main initiatives.

  • (1) Increase sales that is oriented to making and using technical proposals, both domestically and abroad
  • (2) Strive for innovative manufacturing
  • (3) Strengthen new product development
  • (4) Strive for the world’s highest quality, by strengthening human resources development
  • (5) Continue to promote Corporate Social Responsibility activities

We shall continue our efforts to increase our corporate value. I humbly request that you give us ever greater understanding and support.

January, 2020
Akira Yamamoto

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 681 (3,021 with affiliated companies) (as of March,2019)

Directors (Mainly responsible divisions. Executive Officers are responsible for other division or department not mentioned here. )

President Akira Yamamoto (Internal Auditors Office)
Executive Vice President Shigeru Oishi
(Corporate Management Department, General Affairs Department, Information System Department, NPR Iwate Co., Ltd.)
Managing Director Yuji Sakamoto (Business Planning Department, Tokyo Sales Department, Nagoya Sales Department, Osaka sales Department, International Sales Department, METAMOLD Business Promotion Department, Nippon Ring Service Co., Ltd.)
Managing Director Teruo Takahashi (Technical Engineering Department, Product Engineering DepartmentI, Product Engineering DepartmentII, Research & Developmen t Department, New Product Business Development Department, NPR Fukushima Works Co., Ltd.)
Director Masaaki Fujita (Corporate Planning Department, Overseas Operation control Department, Finance Department)
Director Zhongliang Yang (Quality Assurance Department, Production control Department, Production Engineering DepartmentI, Production Engineering DepartmentII, Production Engineering DepartmentIII, Tochigi Plant, NPR ASIMCO Powdered Metals Manufacturing(Yizheng) Co., Ltd)
Director Ryosuke Nagumo
Director Kan Ishii
Audit & Supervisory Board Member (Standing) Yoshihiro Sato
Audit & Supervisory Board Member (Standing) Iwao Hiraishi
Audit & Supervisory Board Member Hiroshi Ishibashi
Audit & Supervisory Board Member Osamu Takai
Audit & Supervisory Board Member Hiroki Kimura
Operating Officer consisting of seven members

Sales Record

Sales by product in 2018
Sales by product in 2018
Trend in sales (FY2014 - FY2018)
Trend in sales (FY2014 - FY2018)

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. Co., LTD / 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 Co.,Ltd / MITSUI Emgineering & 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 Bank, Corporation/ Saitama Resona Bank Ltd./ Development Bank of Japan Ltd.

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 Opened NPR Auto Parts Manufacturing (Yizheng) Co., Ltd. Shanghai Sales Office.
  Transferred partial shares of NPR of Europe GmbH. to Daido Metal Co., Ltd.