Sumitomo Riko Co., Ltd.
(Formerly, Tokai Rubber Industries)

Company Profile

■URL

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

■Address

3-1 Higashi Komaki-shi Aichi-ken, 485-8550, Japan

Business Overview

-Sumitomo Riko is under the umbrella of Sumitomo Electric Industries and manufactures rubber and plastic products.

-After becoming a wholly owned subsidiary of Sumitomo Electric Industries, the Company was delisted from the Tokyo Stock Exchange and the Nagoya Stock Exchange on January 29, 2026. As of March 31, 2026, Sumitomo Electric Industries holds 100% of the Company's shares.

-Main products are listed below by segment:

Business segment	Main products and services, as well as business details
Automotive products	Anti-vibration rubber, hoses, noise insulation, interior products, fuel-cell parts, rubber-seal material
General industrial-use products	Precision resin blades and rolls; anti-vibration rubber for railway cars, housing industry, and bridges; high-pressure hoses, and industrial hoses

-In the fiscal year that ended in March 2026, sales at the automotive-products business accounted for approximately 91.0% of sales.

Shareholders

-The Company was delisted from the Tokyo Stock Exchange Prime Market and the Nagoya Stock Exchange Premier Market on January 29, 2026.

(As of Mar. 31, 2026)

Name or Company Name	Investment Ratio (%)
Sumitomo Electric Industries, Ltd.	100.00
Total	100.00

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Products

Anti-vibration rubbers
-Heat-resistant Rubber

Engine mounts
Hydraulic engine mounts
Exhaust pipe supports

-Chassis parts

Suspension bushes
Suspension member mounts
Strut mounts
Active hydraulic suspension bushes

-Light-weight parts

Engine Mounts with Resin Brackets
Torque Rods with Resin Brackets
Urethane Bound Stoppers
Resin Dust Covers

-Active devices/systems

E-ACM: Electric Active Control Mount
VCS: Vibration Cancellation System

-Dampers

Dynamic dampers

Automotive hoses
-Rubber Fuel Hoses
-Resin Fuel Hoses
-Canisters
-Air Control Hoses
-Water Hoses
-Oil Hoses
-Air Conditioning Hoses
-Power steering hoses
-Hydrogen Hoses

Sound Controlling & Insulation Products
-Engine Covers
-Standing Wave Spacers

Heat Conducting & Sound Reducing Materials
-Magnetic Induction Foaming: MIF

Interior Equipment
-Headrests
-Armrests

Seal Products
-Connector Seals
-Wire Seals

Products for Battery Electric Vehicles (BEV)
-eAxle mount
-eAxle cover
-Cooling piping for electrical system and connector

Products for Fuel Cell Vehicles (FCV)
-Rubber Seal Components

Fuel Cell Gaskets

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History

Dec. 1929	Established Syowa Kogyo (capitalization of 1 million yen) in Yokkaichi City to produce rubber belts.
Jan. 1930	Renamed as Kamata Choutai. Started producing flat conveyor belts.
Oct. 1937	After Sumitomo Densen Seizousho's (currently Sumitomo Electric Industries Ltd.) management participation, the Company was renamed as Tokai Gomu and started producing industrial rubber products aside from rubber belts.
Mar. 1941	Acquired Futaba Gomu in Ashiya City and renamed it Konan Works.
Apr. 1942	Acquired Watanabe Gomu Kogyosho in Okayama City and renamed it Okayama Works. Started manufacturing braided and coiled hoses.
Aug. 1943	Matsusaka Works merged and started.
Jul. 1945	Transferred Konan Works` production facilities to Okayama and Matsuzaka Works and closed Konan Works.
Jul. 1949	Listed on the Nagoya Stock Exchange.
Feb. 1954	Started production of anti-vibration rubber parts for automobiles.
Nov. 1960	Established Komaki Works.
Nov. 1961	Renamed as Tokai Rubber, Industries. Ltd.
Dec. 1964	Headquarters transferred to Komaki City.
Oct. 1966	Closed Yokkaichi Works to streamline production facilities and consolidated them in Komaki and Matsuzaka Works.
May 1968	Established Tokai Kasei Kogyo, a consolidated company, in Komaki City.
Jun. 1977	Okayama Works relocated to a new site in Okayama City.
Jun. 1981	Started producing liquid enclosed engine mounts.
Mar. 1984	Started producing rubber-made parts of OA appliances.
Jan. 1988	Established of DTR Industries, Inc. in Ohio, U.S.A.
Jun. 1990	Set up Fuji Susono Works.
Feb. 1994	Listed on the Second Section of the Tokyo Stock Exchange.
Jul. 1995	Established Tokai Eastern Rubber (Thailand) Ltd. (currently a consolidated subsidiary) in Thailand.
Dec, 1995	Established a consolidated subsidiary, Tokai Rubber (Tianjin) Co., Ltd., in China.
Aug. 1996	Established two consolidated subsidiaries, TRI USA Inc. and TTR Tennessee Inc. in the United States
Sep. 1996	Listed on the First Section of the Tokyo and Nagoya Stock Exchanges.
Feb. 1998	Established a consolidated subsidiary, TRI Ooita AE, in Bungo-takada City, Oita Prefecture.
Jul. 1999	Established a consolidated local subsidiary, TRI (Poland) Ltd., in Poland.
Apr. 2002	Established TRI Technical Center USA, Inc. in USA.
Oct. 2002	Established Tokai Rubber Industries (H.K.) Limited in Hong Kong.
Feb. 2003	Established Tokai Rubber Mold (Tianjin) Co., Ltd., a manufacturing company to produce molds for use in molding automobile rubber parts in China.
Mar. 2003	Established Tokai Dalian Hose Co., Ltd in China.
Sep. 2003	Established Tokai Rubber (Jiaxing) Co., Ltd. in China.
Oct. 2003	Disposed of its business rights in a conveyor-belt business to Bando Chemical Industries, Ltd.
Dec. 2003	Established Tokai Rubber (Guangzhou) Co., Ltd. in China.
Jan. 2004	Established Tokai Kasei (Tianjin) Auto Parts Co., Ltd in China.
Nov. 2005	Established Tokai Imperial Rubber India Pvt., Ltd. in India.
Dec. 2007	Established TRI Kyushu Ltd. and Tokai Kasei (Kyushu) Ltd.
May 2008	Established Tokai Rubber Auto-parts India Pvt., Ltd. in India.
Mar. 2010	Transferred production lines of its Okayama Plant to both its Komaki Plant and TRI Kyushu. After the transfer was completed, the Okayama Plant was closed down.
Mar. 2011	Established Huanyu Tokai Rubber (Tianjin) Co., Ltd. in China.
Jul. 2011	Established Tokai Rubber Technical Center (China) Co., Ltd. in China.
Aug. 2011	Established PT. Tokai Rubber Indonesia and PT. Tokai Rubber Auto Hose Indonesia in Indonesia.
Sep. 2011	Established Tokai Rubber Auto-parts India Private, Ltd. in India.
Feb. 2013	Acquired Dytech-Dynamic Fluid Technologies S.p.A., based in Italy.
Apr. 2013	Turned Inoac Tokai (Thailand) Co., Ltd. into a subsidiary.
May 2013	Acquired Anvis Group GmbH, based in Germany.
Jul. 2013	The Company acquired Produflex Minas Industria de Borrachas Ltda. (This Company is currently called Tokai do Brasil Industria de Borrachas Ltda.)
Oct. 2014	Changed its name from Tokai Rubber Industries Ltd. to Sumitomo Riko Company Limited.
Nov. 2014	Developed and launched production of a fuel-cell gasket designed for fuel-cell vehicles.
Apr. 2015	Established Sumiri FC Seal Co., Ltd.; in Komaki, Aichi Prefecture.
Apr. 2015	Established SumiRiko Yamagata Co., Ltd, located in Yonezawa City, Yamagata Pref., Japan.
Jan. 2016	Established global headquarters in Nakamura Ward, Nagoya, Japan.
Jan. 2016	Tokai do Brasil Industria de Borrachas Ltda. absorbed Tokai Rubber do Brasil Servicos Ltda. As a result, the new company adopted a new name, SumiRiko do Brasil Industria de Borrachas Ltda.
Jan. 2016	Established SumiRiko Automotive Hose Poland Sp. zo. o.
Dec. 2016	Established S-Riko Automotive Hose de Chihuahua S.A.P.I. de C.V. located in Mexico.
Jul. 2017	Established Sumitomo Riko (Asia Pacific) Ltd. located in Thailand.
Jul. 2018	Sumitomo Riko Hosetex Ltd. took over the operations of Sumitomo Riko Hose Sales Co.., Ltd., which both merged under the corporate name Sumitomo Riko Hosetex Ltd.
Apr. 2019	Merged Sumitomo Rick Fine Polymer, making it the Saitama Sales Office.
Jun. 2019	Established Suzhou Tokai Rubber Technology Co., Ltd. in China.
Aug. 2020	Transferred all the stock in two French subsidiaries SumiRiko Industry France S.A.S and SumiRiko AVS France S.A.S.
Jan. 2021	Established SumiRiko Vietnam Co., Ltd.; in Vietnam.
Oct. 2022	Formed an alliance with LanzaTech NZ, Inc. based in the USA to jointly work on reusing rubber, plastics, and urethane, in order to achieve a circular economy.
Jan. 2026	Delisted from the Tokyo Stock Exchange and the Nagoya Stock Exchange as a result of the Company becoming a wholly owned subsidiary of Sumitomo Electric Industries, Ltd.