included a stake in Hino Motors, a manufacturer of large commercial trucks, buses and diesel engines, along with a 16.8 percent stake in Daihatsu, a manufacturer of kei cars, the smallest highway-legal passenger vehicles sold in Japan. That would begin what would become a long-standing partnership between Toyota and the two companies. As part of the partnership, Daihatsu would supply kei cars for Toyota to sell and to a lesser extent Toyota would supply full-sized cars for Daihatsu to sell (a process known as rebadging), allowing both companies to sell a full line-up of vehicles. 1980s After the successes of the 1970s, and the threats of import restrictions, Toyota started making additional investments in the North American market in the 1980s. In 1981, Japan agreed to voluntary export restraints, which limited the number of vehicles the nation would send to the United States each year, leading Toyota to establish assembly plants in North America. The U.S. government also closed the loophole that allowed Toyota to pay lower taxes by building truck beds in America. Also in 1981, Eiji Toyoda stepped down as president and assumed the title of chairman. He was succeeded as president by Shoichiro Toyoda, the son of the company's founder. Within months, Shoichiro started to merge Toyota's sales and production organizations, and in 1982 the combined companies became the Toyota Motor Corporation. The two groups were described as "oil and water" and it took years of leadership from Shoichiro to successfully combine them into one organization. Efforts to open a Toyota assembly plant in the United States started in 1980, with the company proposing a joint-venture with the Ford Motor Company. Those talks broke down in July 1981. Eventually in 1984, the company struck a deal with General Motors (GM) to establish a joint-venture vehicle manufacturing plant called NUMMI (New United Motor Manufacturing, Inc.) in Fremont, California. GM saw the joint venture as a way to get access to a quality small car and an opportunity to learn about The Toyota Way and the Toyota Production System. For Toyota, the factory gave the company its first manufacturing base in North America allowing it to avoid any future tariffs on imported vehicles and saw GM as a partner who could show them how to navigate the American labor environment. The plant would be led by Tatsuro Toyoda, the younger brother of company president Shoichiro Toyoda. The first Toyota