TOKYO—Sony Corp. plans to reduce its work force by an estimated 10,000 jobs, or roughly 6% of its global total, as part of a broader restructuring plan by Chief Executive Kazuo Hirai, people familiar with the matter said Monday.

The cuts could be made over the next two fiscal years, ending in March 2014, though the timing hasn't been settled, the people said. The potential cuts were the first details to emerge of Mr. Hirai's restructuring plan since he succeeded Howard Stringer as CEO this month. The plan is expected to be...