One of Asia's most influential billionaires, Masayoshi Son founded Internet and telecom company Softbank 30 years ago. Today it is a platform for his pan-Asian tech activities. Through Softbank, Son runs the country's top Internet site, Yahoo Japan; he is also the largest shareholder of Renren Inc., China's social-networking-service giant, and a big owner of Alibaba, China's e-commerce giant. His ambitions aren't limited to Asia, though. In July 2010 he invested $150 million in U.S.-based Zygna to accelerate the social-gaming industry in Asia.