Softbank Corp. Chairman Masayoshi Son

Softbank Corp. Chairman Masayoshi Son

Noriyuki Aida/Bloomberg

Softbank Corp. Chairman Masayoshi Son has a history of financial ingenuity in record takeovers including the 2 trillion yen Vodafone K.K. deal financed by Japan’s largest asset-backed loan at the time, and the Sprint Nextel Corp. deal, the country’s biggest overseas acquisition.