Keiretsu Forum is a global investment community of accredited private equity angel investors, venture capitalists and corporate/institutional investors. Keiretsu Forum was founded in the San Francisco East Bay in California in 2000 by Randy Williams.  Keiretsu Forum is a worldwide network of capital, resources and deal flow with 53 chapters on 4 continents. Keiretsu Forum members invest in high-quality, diverse investment opportunities. Keiretsu Forum and Keiretsu Capital (the exclusive worldwide fund partner of Keiretsu Forum) are ranked as the most active venture investors in the USA. The Keiretsu community is also strengthened through its involvement in social and charitable activities.

Keiretsu is a Japanese term describing a group of affiliated corporations with broad power and reach. Keiretsu Forum is described as a conglomeration of individuals or small companies that are organized around private equity funding for mutual benefit. Keiretsu Forum believes that through a holistic approach that includes interlocking relationships with partners and key resources, they can offer an association that produces the highest quality deal-flow and investment opportunities.