The Japanese billionaire has changed the startup game with his aggressive investing and enormous checkbook. Does he know what he’s doing?

“More surprising given the numbers is that SoftBank is largely a one-man show when it comes to deals, despite its ranks of bankers from Deutsche Bank, Goldman Sachs and Morgan Stanley. Lieutenants pitch Son ideas, but he makes the final decisions...

The Japanese billionaire has changed the startup game with his aggressive investing and enormous checkbook. Does he know what he’s doing?

“More surprising given the numbers is that SoftBank is largely a one-man show when it comes to deals, despite its ranks of bankers from Deutsche Bank, Goldman Sachs and Morgan Stanley. Lieutenants pitch Son ideas, but he makes the final decisions...