Sony says it remains on target for its full year profits thanks to earnings that are being boosted by sales of assets and the weaker value of the yen against other currencies.
It reported a quarterly operating profit despite less demand for its televisions, game consoles and other devices.
The asset sales include its US headquarters in New York and one of its main buildings in central Tokyo.
Japanese firms, once key innovators in consumer electronics, have been overtaken by rivals such as Samsung and Apple, and have lost out as consumers flock to smartphones and tablets.
Sony under its latest CEO, Kazuo Hirai, is focusing on mobile phones and tablets, cameras and gaming in a bid to return the company to profit. It is also expanding its medical devices through an investment in endoscope maker Olympus.