CORPORATE History

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Foundation

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1926

Dr. Keikichi Ebihara of the Okochi Research Laboratory of the Institute of Physical and Chemical Research invented a manufacturing method for piston rings that insured uniform pressure on the inner wall of the cylinders. Acquired patents in various countries.

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1927

Established Rikagaku Kogyo to commercialize the inventions of the Institute of Physical and Chemical Research. Succeeded in mass production of piston rings for the first time in Japan.

1932

Constructed Kashiwazaki plant in Niigata Prefecture.

1934

The Kashiwazaki plant was separated from Rikagaku Kogyo to establish Riken Piston Ring Co. (Established Riken Industries Co. in 1941 after renaming, corporate split-up, merger with other companies and so on.)

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1912

Tomonori Suzuki who learned technology of marine engine on his own opened Suzuki Seisakusyo.
Started design and manufacturing of hot bulb marine engines, rice polishing machines and so on.

Suzuki realized keenly necessity of domestic production of piston rings and had been committed to manufacturing them.

1931

Suzuki completed prototypes of piston rings, and changed the company name into Nippon Piston Ring Seisakusyo.

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1934

Nippon Piston Ring Seisakusyo became a public company for mass production of piston rings and further expansion of the business (head office in Tamura-machi, Shiba-ku, Tokyo-city). Opened Kawaguchi plant in Kawaguchi city in Saitama Prefecture.

From early Showa era to postwar recovery

1939

Constructed a plant in Kumagaya, Saitama Prefecture to manufacture piston rings for automobiles and airplanes.

1948

Started manufacture of TOP brand fittings.

1949

After the post-war reorganization, the Riken Industries Co. was relaunched as Riken Kashiwazaki Piston Ring Industries Co. (renamed as Riken Piston Ring Industries Co. in 1950) and Riken Kumagaya Cast Iron Co. (renamed as Kumagaya Cast Iron Co. in 1951). This marked the founding of Riken Corporation.

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1952

Listed on Tokyo Stock Exchange.

1953

Moved the head office of Riken Piston Ring Industries Co. to Nihonbashi, Chuo-ku, Tokyo. Merged with Kumagaya Cast Iron Co. which became Kumagaya Plant.

1960

Moved the head office to Minamisakumacho, Minato-ku, Tokyo.

1939

Opened Yono plant in Yono-machi, Saitama Prefecture.
Moved the head office to Shinsakurada-cho, Shiba-ku, Tokyo-city.
Started mass production of piston rings for airplanes, ships, tanks and automobiles to meet wartime military demand

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1941

Started mass production of chrome plated piston rings for airplanes which greatly improved their wear resistance.

1945

The building of the head office was destroyed by air raid. Temporarily closed the plant at the end of the war.

1947

Received the order of piston rings for US Ford and Chevrolet.

1949

Listed on the Tokyo Stock Exchanges.

1960

Moved the head office to Uchisaiwai-cho, Chiyoda-ku, Tokyo.

1967

Developed oil seals and side seals for rotary engines in cooperation with Toyo Kogyo (currently Mazda Motor)

Business expansion with the development of motorization / overseas expansion

1968

Established Taiwan Riken Ind. Co., a joint venture with Yuen Foong Group to manufacture and sell piston rings, cylinder liners, and cylinder blocks in Taiwan.

1973

Established Siam Riken Ind. Co., Ltd. a joint venture with Siam Motor Co., to manufacture and sell piston rings in Thailand.

1974

Established Riken of America, Inc. to sell piston rings etc. in the US.

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1975

Established P.T. Sri Riken Vigna Indonesia (The corporate name has been changed to P.T. Pakarti Riken Indonesia.),a joint venture with Meiwa Corporation and local business conglomerates, to manufacture and sell cast iron products.

1976

Moved the head office to Kudankita, Chiyoda-ku, Tokyo.

1979

Changed the corporate name to Riken Corporation.

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1983

Established Tsurugi plant which specializes in steel piston ring production.
Established Euro-Riken GMBH in Germany to sell piston rings etc. in Europe.

1986

Established Shriram Pistons & Rings Ltd., a joint venture with Shriram Automotive Products Ltd., to manufacture and sell piston rings in India.

1989

Taiwan Riken Ind. Co., Ltd. established Xiamen Riken Ind. Co., Ltd. as the first affiliate of Riken Group in China.

1991

Constructed a R&D center in Kumagaya.

2003

Siam Riken Ind. Co., Ltd. opened new piston ring plant and started mass production.

2004

Established Riken Automobile Parts(Wuhan)Co., Ltd. as the second manufacturing plant of piston rings in China.

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2007

Due to the Niigataken Chuetsu-oki Earthquake which occurred in July 16th, plants in Kashiwazaki district were discontinued but resumed their production activities by July 23rd.

2009

Established a new sales company PT. RIKEN OF ASIA in Jakarta, Indonesia for sales of piston ring and other products in Asian markets.

2010

Started mass production of wood pellets for wood pellet boilers as a new business

2011

Established a joint venture CK Riken JV Co., Ltd. in Takaoka, Toyama Prefecture.

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2012

Established a new manufacturing company RIKEN MEXICO, S.A. DE C.V. in Aguascalientes, Mexico, to manufacture products for automobile and industrial machines in North, Central and South America.

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1973

Established a sales subsidiary, Schöttle Motorenteile GmbH in West Germany. (Merged with NPR of Europe GmbH. in 2004.)
Established a sales subsidiary, NPR of America, Inc. in the US.
Started market development in Europe and US.

1980

Moved the head office to Kudankita, Chiyoda-ku, Tokyo.

1982

Started operation of NPR FUKUSHIMA WORKS CO., LTD. in Kawamata-machi, Date-gun, Fukushima prefecture which is a main plant of manufacturing valve seat inserts and cylinder liners.

1984

Opened Tochigi plant in Nogi-machi, Shimotsuga-gun, Tochigi prefecture. Relocated Kawaguchi plant to Tochigi plant.

1990

Established NPR IWATE CO., Ltd. in Senmaya-cho (currently Ichinoseki city), Iwate prefecture. Transferred casting and heat treatment processes of Yono plant to NPR IWATE.

1997

Established Siam NPR Co., Ltd. in Thailand in a joint venture with a local corporation. (Became a wholly-owned subsidiary in 2001.)

1998

Moved the head office to Yono city (currently Saitama city), Saitame prefecture.

1999

Established a sales subsidiary, NPR of Europe GmbH. in Germany.

2000

Established PT. Nippon Piston Ring Indonesia (currently PT. NT PISTON RING INDONESIA) in Indonesia in a joint venture with Teikoku Piston Ring Co., Ltd. (currently TPR Co., Ltd.)
Started manufacturing piston rings in Indonesia. (Became a wholly-owned subsidiary in 2013.)

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2002

Opened NPR IWATE CO., Ltd. Ichinoseki Plant. Relocated Yono plant to Ichinoseki plant.

2004

Established NPR Manufacturing Michigan, Inc. in Michigan in the US for manufacturing valve seat inserts.

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2005

Established NPR Auto Parts Manufacturing (Yizheng) Co., Ltd. in Jiangsu Province, China for manufacturing piston rings.
Established NPR SINGAPORE PTE. LTD. in Singapore to strengthen sales in ASEAN.

2006

Established PT. NPR MANUFACTURING INDONESIA in Indonesia for manufacturing piston rings.
Established NPR Auto Parts Manufacturing (Zhenjiang) Co., Ltd. in Jiangsu Province, China for manufacturing valve seat inserts. (Became a joint-venture company with NPR Auto Parts Manufacturing (Yizheng) Co., Ltd. in 2012.)
Established NPR Manufacturing Kentucky, LLC. in Kentucky U.S.A. for manufacturing piston rings.

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2011

Integrated manufacturing subsidiaries in the US, and reorganized as NPR of America, Inc.
Established NPR AUTO PARTS MANUFACTURING INDIA PRIVATE LIMITED for manufacturing valve seat inserts in India.

2013

Established NPR ASIMCO Powdered Metals Manufacturing (Yizheng) Co., Ltd. for manufacturing valve seat inserts in China.

Present

2014

Moved the head office to Sanban-cho, Chiyoda-ku, Tokyo.

2015

Established a new manufacturing & sales company RIKEN SEAL PRODUCTS (WUHAN) CO., LTD. in China to strengthen the manufacturing & sales activity of seal rings in China market.
Established a new sales company RIKEN SALES AND TRADING (THAILAND) CO., LTD. in Thailand to strengthen the sales activity of piston rings in Asian market.

2017

Established a joint venture RIKEN Brother Precision Industry Corporation in Chiryu, Aichi, Japan.

2019

Established a joint venture Riken Power System(Nanjing) Co., Ltd. with Nanjing Feiyan Piston Ring Co., Ltd., an Chinese Corporation, to manufacture and sell piston rings in China market.

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2022

Opened a testing facility for hydrogen engine.

2023

Acquired shares of NIPPON PIPE FITTING CORPORATION to form a subsidiary.
Announced the conclusion of final agreement concerning consolidation of Riken Corporation and NIPPON PISTON RING CO., LTD. through the establishment of a Joint Holding Company by means of share transfer.

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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., and established Dental Implant Medical Device Center in Tochigi Plant in 2015.

2022

Acquired all shares of Normeca Asia Co., Ltd., making it a subsidiary.

2023

Announced the conclusion of final agreement concerning consolidation of NIPPON PISTON RING CO., LTD. and Riken Corporation through the establishment of a Joint Holding Company by means of share transfer.

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on October 2, 2023, established NPR-RIKEN CORPORATION