HKS was formed in 1973 by Hiroyuki Hasegawa, a former engineer for Yamaha Motor Company, and his partner Goichi Kitagawa, while the start up capital was supplied by Sigma Automotive (hence the name HKS). The company began operations by tuning gasoline-powered engines in a dairy-farming shed at the foot of Mount Fuji in Japan. Their goal was to design and build high performance engines and components that major OEM could not or would not produce. In July 1974, Hasegawa engineered and built the first commercialised turbocharger kit for passenger automobiles; since then developing turbocharger upgrades and bolt-on turbocharger kits that subsequently became the core business of HKS. Hasegawa also created the first commercially available electronic turbo timer and boost controller.