Riken Corporation

Company Profile

■URL

https://www.riken.co.jp/english/

■Address

Sanbancho Tokyu Bldg., 3F, 8-1 Sanbancho, Chiyoda-ku, Tokyo, 102-8202 Japan

Business Overview

-A major supplier of piston rings in Japan.

-Riken Corporation (Riken) and Nippon Piston Ring Co., Ltd. (NPR) announced that they have established a wholly owning parent company of both companies, NPR-RIKEN Corporation, through a joint share transfer.

Featured report
2023 Business Overview of Japanese Suppliers	Featured report

Shareholders

RIKEN Corporation became a wholly owned subsidiary of NPR-RIKEN Corporation in October 2023. As a result, it was delisted.

Shareholders of NPR-RIKEN that was listed on the Prime Market of the Tokyo Stock Exchange on October 2, 2023

(As of Mar. 31, 2024)

Name or Company Name	Investment Ratio (%)
The Master Trust Bank of Japan, Ltd. (Trust Account)	8.79
Individual shareholder	5.65
Mizuho Bank Ltd.	3.46
Nippon Life Insurance Company	3.31
Custody Bank of Japan, Ltd. (Trust Account)	2.60
Daishi Hokuetsu Bank, Ltd.	2.28
NPR-RIKEN Employee Stock Ownership Association	2.01
Sumitomo Mitsui Trust Bank, Limited.	1.86
MUFG Bank, Ltd.	1.81
Riken Kashiwazaki Stock Ownership Association	1.78
Total	33.55

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Products

Piston rings

Engine parts
-Camshafts
-Valves seats
-Valve lifters
-Valve spring retainers
-Expansion chambers
-Tappets
-Rocker arms
-Crankshafts

Transmission parts
-Seal rings
-Differential cases
-Pinion shafts

Drive and chassis parts
-Steering knuckles
-Damper forks
-Brake calipers
-Pressure plates
-Lower arms

Other automotive parts
-Vanes for air compressors
-Shoes and shoe discs for air conditioning systems
-Vanes for power steering systems
-Noise-control sheets
-Radio-wave absorption sheets
-Saturation-resistant, noise-control cores
-Compact concatenated noise suppression cores
-Split noise-suppression cores
-Plastic gears
-Plastic cases

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History

Nov. 1927	Rikagaku Kogyo was established. This company was the first to start manufacturing practical rings in Japan.
Dec. 1949	Reestablished as Riken Kashiwazaki Piston Ring (Headquarters at 3-5 Nihonbashi, Chuo-ku), capitalized at 20 million yen.
May, 1952	Listed on the Tokyo Stock Exchange.
Oct. 1979	Corporate name changed to RIKEN Corporation.
Oct. 1998	Received the TPM first-class prize for continuing excellence
Aug. 1999	Provided technical assistance to DANA-ALBARUS (Brazil) for piston rings for VW Brazil
May, 2000	Signed a memorandum of understanding with Dana (USA) for a global tie-up in the piston ring business
Mar. 2001	RIKEN's piston ring manufacturing facilities in Kashiwazaki, Japan and Kumagaya, Japan received ISO14000 certificates.
Feb. 2003	Established the Jakarta representative office as a subordinate organization under the Asian sales team of the overseas sales division.
Jan. 2004	Established Riken Automobile Parts (Wuhan) Co., Ltd. in Hubei, China to manufacture and sell piston rings etc. in China.
Oct. 2004	The Company's piston ring division and the precision machinery component division at the Kumagaya plant received ISO/TS16949 certification in October 2004. (The Company's main domestic and overseas subsidiaries received ISO/TS16949 certification around October 2004.)
June, 2007	The Company and MAHLE GmbH signed a memorandum of understanding under which they will form a global business alliance in the areas of piston rings, camshafts, and other products.
Jan. 2008	The Company sold all shares it owned in Riken of Korea Inc. As a result, the Korean company will be removed from the Group's consolidated statements from fiscal year 2008.
June, 2010	Formed an Overseas Committee designed to promote business strategies outside Japan based on a cross-section of operations.
Aug. 2012	Established Riken Mexico, S.A. DE C.V. as a production plant to supply automotive and industrial machinery parts to North, South, and Central America; in Aguascalientes.
Aug. 2014	Sold entire 100 percent stake of Riken Espana, S.A., and removed it from its consolidated financial statements.
Aug. 2014	Moved its headquarters to Sanbancho, Chiyoda-ku, Tokyo.
Oct. 2014	Jointly with Amtek India Limited, the Company established Amtek Riken Casting Private Limited in Rajasthan, India to manufacture and sell automotive castings.
Apr. 2015	Signed an MOU with KS Kolbenschmidt (based in Germany) that covers global sales, engineering, and development of power cylinder systems that includes pistons and piston rings.
Apr. 2015	Spun off the sealing ring business of Riken Automobile Parts (Wuhan) Co., Ltd., establishing it as Riken Sealing Parts (Wuhan) Co., Ltd., in order to strengthen the sealing-ring business in China.
Oct. 2015	Established Riken Sales and Trading (Thailand) Co., Ltd. in Bangkok, Thailand, to strengthen sales of piston rings in Asia.
Apr. 2017	Formed a business alliance of the camshaft business with Brother Precision Ind. Co., Ltd. and set up Riken Brother Precision Industry Corporation in Chiryu City, Aichi Pref.
Nov. 2018	Liquidated Allied Ring as a result of environmental changes taking place in the automotive-industry.
Jun. 2019	Established Riken Power System (Nanjing) Co,. Ltd., a joint venture with Nanjing Feiyan Piston Ring Co., Ltd., to manufacture and sell piston rings in China.
Apr. 2022	Moved from the First Section of the Tokyo Stock Exchange to the Prime Market due to the TSE's reorganization.
May 2023	Turned JFE Tsugite Co., Ltd. into a consolidated subsidiary, renaming it Nippon Pipe Fitting Corp.
Jun. 2023	Agreement reached at general meeting of shareholders on plan to merge with Nippon Piston Ring Co., Ltd. and transfer stock shares.
Oct. 2023	Established NPR-RIKEN Corporation, and listed it on the Prime Market of the Tokyo Stock Exchange on same day.
Feb. 2024	Acquired equity shares in Shinwa Banes Corporation, making it a subsidiary of Riken Corporation.