TOKYO — Sony more than doubled its projected net loss for the past financial year to ¥520 billion, its worst loss ever, as an additional tax expense hurt a company already battered by heavy losses in its television business, a strong yen and natural disasters in Japan and overseas.

During a news conference at its headquarters in Tokyo on the projected annual loss, equivalent to $6.4 billion, the electronics and entertainment company stopped short of confirming reports that it planned to eliminate 10,000 jobs, a weighty move in a country where staff cuts are considered a breach of a company’s social contract.

But the chief financial officer, Masaru Kato, said that all options were under consideration as Sony pushes ahead with a restructuring drive. The company expects the effort will catapult it back to profitability for the current financial year, which ends next March, with an operating profit of ¥180 billion.

“We will force through reforms, and there will be no sacred cows,” Mr. Kato said. “The company management takes these numbers very seriously.”