What INOAC USA makes

INOAC USA is the North American operating group of INOAC Corporation, a privately held Japanese materials company, and it builds its business on polyurethane, rubber, plastics, and composites. In North America the largest activity is automotive. Through INOAC Group North America and INOAC Interior Systems, the company molds interior parts for Japanese and US automakers: instrument panels, headliners, armrests, seat cushioning, headrests, pillar garnishes, and foam-in-place interiors that include in-house cut and sew. Its foam-in-place operations are vertically integrated, which the company presents as a footprint advantage for OEM programs.

The exterior side runs under INOAC Exterior Systems, which makes Class A automotive exterior components in painted, primer-ready, molded-in-color, and textured finishes, along with spoilers, mud guards, roof molding, and aero parts. A separate technical-foam business, Woodbridge INOAC Technical Products, produces engineered polyurethane foams for sound, vibration, shock, heat, sealing, and lightweighting. INOAC also makes Cellasto microcellular polyurethane elastomer for suspension and energy absorption, and runs a Packaging Group that does injection stretch blow molding, PET bottles, and thermal-insulation packaging. One growth line is foam for electric-vehicle battery packs: cushioning, compression, sealing, vibration control, and flame-retardant materials that separate cells and manage surface pressure as batteries expand and contract.

Ownership and history

INOAC USA is privately held, part of INOAC Corporation of Japan. The group traces to Inoue Rubber, founded in Nagoya in 1926 to make bicycle tires and tubes, with INOAC Corporation formally established in 1954. The parent describes itself as an independent, diversified materials company working across polyurethanes, polyolefins, elastomers, plastics, and composites, and reported group sales of 205.5 billion yen for the year ended December 2025. The North American organization operates through several affiliated entities, with INOAC USA, Inc. as the umbrella and INOAC Group North America as the automotive-parts operating company.

The North American footprint grew in two documented steps. In November 2021, INOAC Group North America announced a 13.7 million dollar expansion of its Springfield, Kentucky plant to create 49 full-time jobs, tied to new business supplying Ford's Kentucky Truck Plant. In February 2023, INOAC USA bought out ABC Technologies' 50 percent share of their former joint venture, making INOAC Exterior Systems wholly owned and adding four facilities and more than 1,200 employees. In November 2024, INOAC and Rogers Corporation dissolved their polyurethane-foam joint ventures in Japan and China; the Japan venture became a wholly owned INOAC subsidiary, and INOAC rebranded its high-performance foam line as SlimFlex.

North American footprint

INOAC runs more than 20 manufacturing and office sites across the United States, Canada, and Mexico. The North American headquarters and finance office sit at 901 1/2 Nutter Drive in Bardstown, Kentucky, alongside the Packaging Group and FET Engineering. Interior Systems is headquartered in Farmington Hills, Michigan, with plants in St. Marys, Ontario and Bessemer, Alabama. Exterior Systems operates in Fremont, Ohio, Livingston, Tennessee, and Toronto, Ontario. Technical foam runs through Woodbridge INOAC Technical Products in Chattanooga, Tennessee, Moonachie, New Jersey, and Springfield, Kentucky, with additional foam operations at Olympic Products in Greensboro, North Carolina and Southwest Foam in El Paso, Texas. Mexican operations include sites in the Monterrey, Queretaro, Saltillo, and Leon areas. This spread of interior, exterior, and foam plants close to vehicle-assembly regions is what lets INOAC serve automotive programs across tiers and manage nearshoring between US, Canadian, and Mexican sites.

Known customers

INOAC's automotive customers are mostly unnamed on its own site, as is normal for an interior and exterior parts supplier. One program is on the public record:

Beyond that, INOAC states it supplies auto interior and exterior parts to Japanese and US automakers, and its exterior business positions itself as a key supplier of Class A components to North American vehicle manufacturers.

Sourcing evidence

INOAC's Bardstown entity appears in US customs records with 49 ocean-import shipments, most recently in March 2026. The named foreign shippers are all INOAC-group affiliates: Inoac International and the Inoue Rubber operations in Japan and Vietnam. That pattern, group materials and inputs flowing in to feed domestic molding and foam operations, is the signature of a manufacturer, not a reseller. Buyers weighing tariff exposure should note that this is a small slice of a much larger North American operation: these records cover ocean freight only, INOAC's US plants ship under several entity names, and most North American material moves by truck and rail between the company's own sites.

Frequently asked questions

What does INOAC USA make?

INOAC USA makes automotive interior parts (instrument panels, headliners, armrests, seat cushioning, pillar garnishes), Class A exterior components, and engineered polyurethane technical foams, including foams for electric-vehicle battery packs. It also runs a packaging business making PET bottles and thermal-insulation packaging. The products are built on polyurethane, rubber, plastics, and composite materials.

Who owns INOAC USA?

INOAC USA is privately held and is the North American arm of INOAC Corporation, a diversified Japanese materials company. The group traces back to Inoue Rubber, founded in Nagoya, Japan in 1926, with INOAC Corporation formally established in 1954.

Where is INOAC USA headquartered?

INOAC USA's North American headquarters is at 901 1/2 Nutter Drive, Bardstown, Kentucky 40004. Its Interior Systems business is headquartered in Farmington Hills, Michigan. The company operates more than 20 sites across the United States, Canada, and Mexico.

Who are INOAC USA's customers?

Most of INOAC's automotive customers are unnamed, but a 2021 Kentucky economic-development filing documents that its Springfield plant expansion supported new business with Ford's Kentucky Truck Plant. INOAC supplies interior and exterior parts to Japanese and US automakers.

How many employees does INOAC USA have?

INOAC's North American operation employs well over 1,000 people across 20-plus facilities; a single 2023 acquisition added four plants and more than 1,200 employees to its exterior-systems business. A precise North American headcount is not published. The Japanese parent separately reports about 1,900 employees, which is a parent-company figure, not a North American one.

Last verified September 27, 2026. Is this your company? Request a correction.