Nomura Holdings Inc.'s besieged chief executive won a shareholder vote Monday, surviving a call for his ouster from the board following an information leak.

CEO Koji Nagai was re-appointed at an annual shareholder meeting alongside nine other nominees proposed by the company, Japan's biggest brokerage said in an emailed statement. The vote was held almost a week after Nomura announced several moves to placate investors following the leak and recent losses, including governance changes and a $1.4 billion stock buyback.

But those reforms — particularly tweaks to how it selects its top executives — are also likely to weaken the influence of management over who eventually succeeds Nagai, the bank's longest-serving CEO in three decades.