Yoshikazu Tanaka is billionaire founder of mobile phone company , Gree . How would you like to change Japanese society ? The company is valued at $ 3 billion ; personal fortune $ 1 billion . Tanaka is often compared to Google founder Mark Zuckerberg .
Yoshikazu Tanaka is billionaire founder of mobile phone company , Gree . The company is valued at $ 3 billion ; personal fortune $ 1 billion . Tanaka is often compared to Google founder Mark Zuckerberg .