19. Hiroshi Mikitani
Net Worth: $8.7 billion
Hiroshi Mikitani, Chairman and CEO of Japan’s biggest e-retailer, Rakuten, is always on the hunt for a deal. His latest acquisition: Ebates, an online rebate site in the United States that allows people to earn cash back when buying goods at stores like Macy’s and Home Depot, which he bought for a cool billion. He heads the Japan Association of New Economy, a group of technology companies that work with Japan’s Prime Minister Abe to ramp up the country’s economic growth. Mikitani is building a $20 million-plus home in Tokyo’s trendy Shibuya ward; he’s also made the U.S. his second home.
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