A keiretsu (系列^?, lit. system, series, grouping of enterprises, order of succession) is a set of companies with interlocking business relationships and shareholdings. It is a type of business group. The keiretsu maintained dominance over the Japanese economy for the greater half of the 20th century, but are beginning to lose their grip.

The member companies own small portions of the shares in each other's companies, centered on a core bank; this system helps insulate each company from stock market fluctuations and takeover attempts, thus enabling long-term planning in innovative projects. It is a key element of the automotive industry in Japan.

The corporate governance of Japan dates back to the 19th century, much of which was propelled by the formation of the Meiji Restoration in 1866 by the Japanese government, the same time when the world entered the Industrial Revolution. These formations were termed zaibatsu. Prior to the war, Japan remained dominated by four major zaibatsus: Mitsubishi, Sumitomo, Yasuda and Mitsui. They focused on steel, banking, international trading and various other key sectors in the economy, all of which was controlled by a holding company. Apart from this, they remained in close connection to influential banks that provided funding to their various projects.

Randel ("Randy") Luvelle Williams (born 23 August 1953 in Fresno, California) was an American athlete who mainly competed in the men's long jump event.

He competed for the United States at the 1972 Summer Olympics held in Munich, Germany where he won the gold medal in the long jump. His winning jump of 8.34m (27-4½) set the World Junior Record that has stood ever since. Williams also competed for the United States in the 1976 Summer Olympics held in Montreal, Canada in the long jump where he won the silver medal.

Williams attended the University of Southern California. In high school, Williams attended Edison High School in Fresno. At the CIF California State Meet in 1969 he finished third, behind future rival James McAlister, in 1970 he finished second behind future NFL star, Lynn Swann and in 1971, he won the meet in what would have clearly been a meet record, had it not been wind aided.

In 2009, Randy Williams was inducted into the National Track and Field Hall of Fame.