Mitsuboshi

About Mitsuboshi Belting

Mitsuboshi Belting Ltd. has been engineering precision power transmission belts since 1919, when the company was founded in Kobe, Japan as a producer of industrial drive belts. Over more than a century of continuous development, Mitsuboshi has grown from a domestic Japanese manufacturer into a globally recognized leader in belt technology — earning the trust of vehicle manufacturers and professional technicians worldwide.

The company's guiding philosophy, "produce quality and sell quality," is more than a motto. It reflects a commitment to rigorous quality assurance that runs through every product line. Mitsuboshi's domestic and overseas manufacturing facilities maintain ISO 9001 certification, and automotive plants operate under ISO/TS 16949 — one of the most demanding quality management standards in the industry. This dedication to quality is a key reason Mitsuboshi belts are specified as original equipment (OEM) on vehicles from Honda, Acura, Mitsubishi, Lexus, and other major automakers.

To serve global demand, Mitsuboshi expanded its manufacturing footprint well beyond Japan, establishing facilities across Asia and in the United States. MBL (USA) Corporation, part of the Mitsuboshi Belting family, produces OEM-quality automotive belts in North America for both OEM and aftermarket applications.

Mitsuboshi Automotive Belt Products

Mitsuboshi's automotive catalog is focused squarely on engine and accessory belt systems — the critical components that keep an engine's valvetrain, charging system, and accessories running in perfect synchrony. Their product line spans several key categories:

• Engine Timing Belts: Mitsuboshi timing belts are available in multiple engineered series — including SUPER TORQUE and MEGA TORQUE variants — designed for precise valve timing, low noise, and extended service life in both conventional and high-performance engines.
• Serpentine Belts: Marketed under the RIBSTAR™ and Star Fit® names, Mitsuboshi's multi-ribbed serpentine belts deliver quiet, efficient power to alternators, power steering pumps, air conditioning compressors, and other engine accessories.
• Engine Timing Belt Component Kits: For a complete timing belt service, Mitsuboshi offers component kits that bundle the timing belt with the matched tensioners, idlers, and other hardware needed for a thorough job.
• Accessory Drive Belts: Mitsuboshi's raw-edge V-belts and multi-rib accessory drive belts are built for durability in high-temperature, high-load accessory drive environments across passenger cars, trucks, and commercial vehicles.
• Drive Belts: Mitsuboshi's broader drive belt range covers a wide array of vehicle applications, from Japanese and Korean imports to American and European models, making it a versatile choice for shops and enthusiasts alike.

Why Technicians Trust Mitsuboshi

Timing and drive belts are among the most safety-critical components in any engine. A timing belt failure can cause catastrophic engine damage, which is why so many professional technicians and enthusiasts insist on OEM-grade parts for replacement. Mitsuboshi's long track record as a factory-authorized belt supplier makes their aftermarket replacements a natural, confident choice — the same engineering that went into the original belt, available over the counter.