📋 Summary
- Sumitomo Riko Company Limited, formerly Tokai Rubber Industries, is a Japanese automotive rubber components specialist founded in 1929 as Showa Yokkaichi Sekiyu, becoming Tokai Rubber Industries in 1937 and taking its current name in 2014, headquartered in Komaki, Aichi Prefecture
- The company’s core automotive products are anti-vibration rubber components, including electronically controlled active engine mounts, alongside rubber and resin hoses for fuel, water, and air-control systems, and urethane noise-insulation interior parts
- Automotive products account for roughly 90.7 percent of the company’s sales as of fiscal year 2025, reflecting a genuinely deep automotive specialization
- Sumitomo Riko completed integration with Germany’s Anvis Group in 2017, giving the company genuine global Tier 1 reach; the company is part of the Sumitomo Group keiretsu, publicly traded, and genuinely distinct from Toyoda Gosei, covered in a separate article in this series, which focuses on airbags, weatherstripping, and interior trim rather than engine mounts and hoses
The engine mount quietly absorbing vibration between your JDM vehicle’s engine and chassis, a component genuinely easy to overlook until it fails and every bump transmits directly into the cabin, has a strong chance of being a Sumitomo Riko product, a Japanese rubber specialist with nearly a century of automotive engineering history.
From a 1929 Rubber Hose Maker to a Global Anti-Vibration Specialist
Sumitomo Riko was founded in 1929 as Showa Yokkaichi Sekiyu, later Kamakura Rubber, according to the company’s own corporate history, originally manufacturing industrial rubber hoses. The company became Tokai Rubber Industries in 1937 and took its current name, Sumitomo Riko, in 2014. The company is headquartered in Komaki, Aichi Prefecture. Automotive products, including anti-vibration rubber components such as electronically controlled active engine mounts, alongside rubber and resin hoses and urethane noise-insulation interior parts, account for roughly 90.7 percent of the company’s sales as of fiscal year 2025, reflecting a genuinely deep automotive specialization.
💡 Tip: Sumitomo Riko Went Global Through a 2017 German Merger
Sumitomo Riko completed integration with Germany’s Anvis Group in 2017, according to the company’s own history, giving the company genuine global Tier 1 manufacturing reach well beyond Japan, a useful “JDM-era supplier goes global” story worth knowing if you encounter the company’s rubber components outside a Japanese-market context.
Genuinely Distinct From Toyoda Gosei’s Rubber and Plastic Business
It’s worth being precise about how Sumitomo Riko differs from Toyoda Gosei, covered in a separate article in this series: Toyoda Gosei’s focus is airbags, weatherstripping, and interior plastic trim, while Sumitomo Riko’s specific specialization is anti-vibration rubber components like engine mounts, and fuel, water, and air-control hoses. Both companies work broadly within automotive rubber and plastic components, but from genuinely distinct product-category positions.
A Genuinely Massive Global Manufacturing Footprint
Sumitomo Riko’s international reach began with the acquisition of Germany’s Anvis Group in 2013, with full operational integration completed in 2017, and the German business now operates as SumiRiko AVS. The combined group today operates roughly 105 production sites across 23 countries, supported by 12 research and development centers worldwide, according to the company’s own disclosures. This genuinely global scale is reflected in Sumitomo Riko’s customer list, which extends well beyond Japanese automakers to include the Volkswagen Group, BMW, Daimler, the Renault-Nissan alliance, and General Motors, a reminder that a company most JDM enthusiasts associate purely with Japanese vehicles is, in practice, a significant supplier to much of the global auto industry.
Why Engine Mount Condition Genuinely Matters
A worn or failed engine mount can genuinely cause excessive vibration, unusual noise, or even engine movement severe enough to affect drivetrain components, particularly noticeable on an aging JDM import as the rubber compound degrades with age and heat cycling over time. Understanding that a major, established specialist like Sumitomo Riko likely engineered your vehicle’s original engine mounts provides useful context when diagnosing vibration issues or researching genuine OEM-equivalent replacement parts.
⚠️ Caution: Don’t Ignore Excessive Engine Vibration or Movement
Excessive engine vibration or visible engine movement under acceleration can genuinely indicate a failed engine mount, and continuing to drive with this condition risks additional stress on drivetrain components and connected hoses or wiring. Have any suspected engine mount issue diagnosed and repaired by a qualified professional promptly.
Frequently Asked Questions
Q: What does Sumitomo Riko make?
A: Anti-vibration rubber components including engine mounts, rubber and resin hoses, and urethane noise-insulation interior parts.
Q: Is Sumitomo Riko the same as Toyoda Gosei?
A: No, they’re separate companies. Toyoda Gosei focuses on airbags, weatherstripping, and interior trim, while Sumitomo Riko specializes in engine mounts and hoses.
Q: Was Sumitomo Riko always called that?
A: No, the company was founded in 1929, became Tokai Rubber Industries in 1937, and took its current name, Sumitomo Riko, in 2014.
Q: Is Sumitomo Riko a global company?
A: Yes, it completed integration with Germany’s Anvis Group in 2017, giving it manufacturing reach beyond Japan.
This article is for general informational purposes based on publicly available company sources. Have any suspected engine mount issue diagnosed and repaired by a qualified professional promptly.
Image credit: Dacia Sandero I engine bay with legend by Dacia 1410 Sport, CC BY-SA 4.0, via Wikimedia Commons
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