Business outline・History

Business outline

Company outline
Name Sumitomo Riko Company Ltd. Saitama Plant
Employee 411. (31st Mar, 2018)
Average age:35.6 years old
Business Manufacture and sales of various High-functional precise rubber products.
Location 255 Ohyahongo, Ageo-shi, Saitama, 362-0044, Japan
Plant 19,061㎡ (site area) /
20,435㎡ (factory).
Main customers Car manufacturerers and its related companies, Electrical equipment manufacturers,・Electronics and various industrial companies.


1953 Founded “Hakusui Rubber Industry Ltd ” in Katsushika, Tokyo
1963 Started the operation at Ageo Plant (present location) in Ageo, Saitama
1967 SUMITOMO RIKO and FUKOKU BUSSAN CO., LTD participated in the management.
1968 Started the production of anti-vibration rubber with the technology of SUMITOMO RIKO.
1971 Started the production of rubber seal for wire harnesses.
1992 Change the Company name from “Hakusui Rubber Industry Ltd” to “TRI Saitama Ltd.”
1998 Acquired ISO-9001 certificate.
1999 Started the consignment production at SumiRiko Eastern Rubber (Thailand) Ltd. (until 2014)
2002 Acquired ISO-14001 certificate.
2013 Started the consignment production at Tokai Rubber (Guangzhou) Co., Ltd. (until 2015)
2013 Established SumiRiko Fine Elastomer (Thailand) Ltd. as our original manufacturing base.
2014 Took over the business of Tokai Rubber Industries (H.K) Ltd. and TOKAI RUBBER DONGGUAN CO,LTD; acquired 100% ownership.
2014 Started the production at SumiRiko Fine Elastomer (Thailand) Ltd.
2015 Built the second factory at TOKAI RUBBER DONGGUAN CO,LTD and started the production of rubber seal.
2016 2016 Changed the Company name from “TRI Saitama LTD.” to “SumiRiko Fine Elastomer, Ltd.”
2018 Sumitomo Riko Company Ltd. acquired 100% ownership of SumiRiko Fine Elastomer, Ltd.
2019 SumiRiko Fine Elastomer, Ltd. will be a defunct company due to the absorption merger by Sumitomo Riko Company Ltd., the merging company.

Access Map

Production, Invention, Design and Sales.(Saitama Plant)
Manufacturing base for mass production in China and Thailand
International trading firm in Hong kong for exporting business

Sumitomo Riko Company Ltd. Saitama Plant
Oyahongo 255, Ageo, Saitama 362-0044 Japan.
Manufacture and sales rubber products.

SumiRiko Fine Elastomer (Thailand) Ltd.
111/3, 111/4 Moo 5, Tambol Makhamkoo,
Amphur Nikompattana, Rayong,
21180 Thailand
Manufacture and sales rubber products.

No4,Area2,JinHe Industrial Zone,Zhangmutou,Dongguan,Guangdong
Manufactures precision vibration-proof rubber.

Tokai Rubber industries (H.K.) Ltd.
Suite1215-16,12/F,Delta House,3 On Yiu Street,ShaTin,N.T,Hong Kong
Sales various rubber products.


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