Masayoshi Son has a $8.6 billion dilemma on his hands.
His SoftBank Group Corp. is the largest investor in Yahoo Japan Corp., controls several board seats and wields more power over the country’s most profitable website than anyone. That’s been possible because Marissa Mayer’s Yahoo Inc., the next biggest shareholder with 35.5 percent, has been happy to leave management to the nation’s second-richest man.
