What Aisin makes

Aisin is one of the world's largest automotive suppliers, ranked 7th by automotive revenue in a 2026 industry study of the top 100 suppliers, and its product lineup covers, in the company's own words, nearly all of the parts that make up a car. The mobility business runs five divisions. Powertrain is the historic core: automatic transmissions (a business built through the 1969 Aisin-Warner joint venture with Borg-Warner), hybrid transmissions, and eAxles for battery-electric vehicles, where a second-generation unit entered production on a flexible line in 2026 and the company has described building a global system for 4.5 million electric drive units a year. Chassis and vehicle safety systems include brake systems through group company ADVICS, cooperative regenerative braking, and automated parking. The body division makes power sliding door systems, sunroofs, and door latches. A location-based-services division sells car navigation and the Choisoko rideshare service, and an aftermarket division serves repair and maintenance channels.

Beyond vehicles, an energy solutions business sells residential fuel-cell cogeneration systems and gas heat pumps, and group companies supply ECUs, pistons, die castings, and CVT belts. For buyers mapping tier-1 suppliers, Aisin sits in the small class of full-line Japanese groups whose scope spans drivetrain, body, brakes, and software-adjacent services.

Financial performance

Aisin reported roughly 29.2 billion euros in automotive-only revenue for FY2025, per the 2026 study, up 2.8 percent from 28.4 billion euros in FY2024. Its operating-income margin improved to 4.9 percent from 3.6 percent the year before. The company's fiscal year ends March 31. Consolidated headcount was 113,292 as of March 31, 2026, across 186 consolidated subsidiaries, 69 in Japan and 117 overseas, plus 14 equity-method affiliates. Capital stock is 45 billion yen. In February 2026 the company published its 2028 Medium-Term Management Plan, stating twin aims of strengthening earning power and investing in future growth, and it has been running share repurchases through 2026 per its IR disclosures.

Ownership and history

AISIN CORPORATION is listed on the Tokyo Stock Exchange under ticker 7259 and is a core member of the Toyota Group. The company traces to Tokai Koku Kogyo, an aircraft-engine maker founded in 1943; Aisin Seiki was formed in 1965 by merging Aichi Kogyo and Shinkawa Kogyo. Milestones include the Aisin-Warner automatic-transmission joint venture in 1969, the first overseas subsidiary in Los Angeles in 1970, the founding of brake specialist ADVICS in 2001, and the 2021 merger of Aisin Seiki and Aisin AW that created the current AISIN CORPORATION. The head office is at 2-1 Asahi-machi, Kariya, Aichi, Japan, with about 16 plants concentrated in Aichi prefecture and regional headquarters for the Americas, Europe, and ASEAN. Moritaka Yoshida is President; Yoshihisa Yamamoto (CTO and CDO) and Daisuke Kondo (CFO and CSO) serve as Executive Vice Presidents.

Certifications and quality

The company states it has established a quality management system compliant with IATF 16949, with 52 production sites certified as of May 2025. Its quality lineage is long: Aisin won the Deming Prize in 1972 and in 1982 became the first Japanese company to hold four major TQC and TPM prizes. It built the Fujioka Proving Ground in 1970, which it describes as the first comprehensive test facility with a dedicated course built by an automotive components manufacturer, and operates the Fowlerville Proving Ground in Michigan. The company also discloses, candidly, that in response to certification irregularities within the Toyota Group and quality issues at a North American subsidiary, it created a Group Regulatory Certification Committee with direct senior-management involvement.

Known customers

Toyota is the anchor customer, with Toyota-related products in the company's history since 1966 and 2026 trade coverage describing Aisin as Toyota's key vendor. In April 2026 the company announced it had begun contract manufacturing Mazda's six-speed automatic transmission in the United States. Programs for other OEMs are documented in the company's own releases: in August 2026 it announced that its newly developed two-motor hybrid drive module was adopted for Stellantis' new Jeep Cherokee, a notable electrification win outside the Toyota Group. The production part approval process for these programs is typically conducted directly with the OEM engineering teams.

Sourcing evidence

US import activity runs through Aisin World of America, the group's Torrance, California sales arm. The customs record shows 17,252 ocean-freight shipments through September 2026, with the most recent on September 16, 2026 (4 of 9 named non-group suppliers shown below; omits air freight and Mexico/Canada truck-rail lanes, which are not captured in US CBP manifest data).

Japan accounts for the majority of volume. Nine distinct non-group shippers appear on record, including brake and body-component manufacturers from South Korea and Taiwan. The 12-month shipment rate is essentially flat versus the prior year (down about 3 percent), consistent with steady captive supply rather than a growth or contraction signal.

Frequently asked questions

What does Aisin make?

Aisin makes automotive parts covering nearly every vehicle system: automatic and hybrid transmissions, eAxles for EVs, brake systems (through ADVICS), power sliding doors, sunroofs, latches, car navigation, and aftermarket parts, plus energy products such as residential fuel-cell cogeneration systems and gas heat pumps.

Who owns Aisin?

AISIN CORPORATION is a publicly listed company on the Tokyo Stock Exchange (ticker 7259) and a core member of the Toyota Group. The current company was formed in 2021 by merging Aisin Seiki, established 1965, with transmission maker Aisin AW.

What is Aisin's annual revenue?

Aisin's automotive-only revenue was about 29.2 billion euros in FY2025, up 2.8 percent year over year, at a 4.9 percent operating-income margin, per a 2026 study of the top 100 automotive suppliers. Its fiscal year ends March 31.

Where is Aisin headquartered?

Aisin is headquartered at 2-1 Asahi-machi, Kariya, Aichi 448-8650, Japan, with about 16 plants in Aichi prefecture and regional headquarters for North America, Europe, and ASEAN. Consolidated employment was 113,292 as of March 2026.

Who are Aisin's customers?

Toyota is the anchor customer, and Aisin supplies automakers worldwide. Documented programs include the two-motor hybrid drive module adopted for Stellantis' new Jeep Cherokee (August 2026), contract manufacturing of Mazda's six-speed automatic transmission in the US (April 2026), and a long history of global OEM automatic-transmission supply.

Last verified September 22, 2026. Is this your company? Request a correction.