Masayoshi Son's bold bets on tech defined an era. A new book asks if the SoftBank boss is a visionary or a gambler.

Masayoshi Son is the CEO and founder of tech and telecommunications ... Son is married and has at least two children, but he keeps his family life private. The CEO married Masami Ohno, the ...

Not far from the storied venture capital firms on Sand Hill Road, there’s a palatial estate where Masayoshi Son, Silicon Valley’s newest kingmaker, shapes the future. Reaching him requires ...