Toyota Motor Corporation is the world's third largest automobile manufacturer, with popular brands such as Toyota, Lexus, Daihatsu, Scion and Hino. Its cars are sold in over 140 countries and regions around the world, to the figure of 10.09 million in 2015. In addition to the twelve factories and eleven manufacturing subsidiaries located in Japan, Toyota has 45 manufacturing companies in 26 other countries, employing over 240,000 people. In the fiscal year up to March 2003, Toyota achieved a profit of USD16.05 billion, of which 90% came from its automotive business, including auto sales financing. Toyota's investments in other areas have also continued to grow, ranging from telecommunications, housing and pleasure crafts.

Toyota Financial Service Corporation (TFSC) is a financial business aimed at promoting product sales. A fully-owned subsidiary of Toyota Motor Corporation with a capital of 67.5 billion yen, its pre-tax profit for the period of April 2001 to March 2002 was 61.8 billion yen. In order to promote the sales of Toyota brands in Taiwan and strengthen the combination of automotive products with financial and insurance services, TFSC is the major shareholder of two of Hotai's affiliates, Ho Ruen Financial Co. (HFC) and Ho Lease Car Rental Co. (HLC), owning 33.34% of each of the two companies. TFSC is a renowned auto financing service provider in both Japan and around the world with operations in over 20 countries.

In the 1960s when the automobile industry led the development of the country, the Ministry of Economic Affairs, Ministry of National Defense and the US's General Motors established a joint venture named “Huatung Motors Ltd.,” which was to become Kuozui Motors Ltd. today. After GM withdrew its investment in 1983, Hotai Motor, China Development Trust and Hino Motor jointly set up Kuozui Motors Ltd. in early 1984. After much hard work and struggle, the company gradually consolidated its position in the limited heavy vehicles market. With this consideration, and seeing the advantage presented to the development of the small vehicles market by the booming economy, Kuozui decided to bring in funds and technology from Toyota Japan for the production of sedans. Currently, Kuozui has two factories, the one in Chungli covering a ground area of 230,000m2 has a production capacity of 80,000 vehicles per year, and the other in Kuanyin covering a ground area of 330,000m2 has a production capacity of 30,000 vehicles per year.