May 9 (Bloomberg) -- Taizo Son, the youngest brother of SoftBank Corp. magnate Masayoshi Son, has become a billionaire after shares of his company GungHo Online Entertainment Inc., which makes the "Puzzle & Dragons" game application, soared more than 10-fold this year.
The GungHo chairman holds a 27.8 percent stake in the Tokyo-based company. The shares account for almost all of his $3.3 billion fortune, according to the Bloomberg Billionaires
Index. Matthew G. Miller reports on Bloomberg Television's "Surveillance." (Source: Bloomberg)