Softbank's Long - Term Strategy Under Scrutiny As Founder Son Stays On

SoftBank's long-term strategy under scrutiny as founder Son stays onSoftBank Group Corp. founder Masayoshi Son aims to stay at the helm longer than originally planned to focus on the burgeoning business field of artificial intelligence, but is now under increased scrutiny over his longer-term strategy as no successor is in sight.

Son faces a number of challenges, including turning around U.S. mobile network provider Sprint Corp., a SoftBank group company. Most recently, the abrupt resignation of SoftBank President Nikesh Arora, the heir apparent credited with making bold overseas investment decisions, has raised uncertainty about the Japanese conglomerate's investment business, analysts say.

Arora's departure, coming less than two years since he joined SoftBank from Google Inc., caught many off guard, putting the company's succession planning back to square one.