Companies in Kariya, Aichi

DENSO's origin is a corporate spin-off with a difference: in 1949, Toyota spun off its electrical parts division into an independent company, and that company — now DENSO — grew into the world's second-largest automotive parts supplier, while remaining one of Toyota's most trusted partners. The Kariya-based firm is the invisible giant behind modern cars: if your vehicle has climate control, a starter motor, an alternator, or an engine ECU, it very likely came from DENSO. The company's product range is the widest in the industry: powertrain systems (fuel injection, spark plugs, turbochargers), thermal systems (air conditioning compressors, radiators, battery cooling for EVs), electrification components (inverters, motors, DC-DC converters), and semiconductors for automotive use, including the sensors that make autonomous driving possible. DENSO also leads in radar and camera-based safety systems. With about 160,000 employees and annual revenue near ¥7 trillion (US$47 billion), DENSO is reinventing itself for the EV era — investing in SiC power semiconductors, thermal management for battery packs, and mobility software. For automakers outside Toyota's orbit, DENSO has become a preferred supplier of electrification components, proving the spin-off has outgrown its parent's shadow.