Toshiba shares jumped Wednesday on expectations it will meet a deadline to submit long-delayed earnings to financial regulators, easing fears the troubled conglomerate's stock will be yanked from the Tokyo Stock Exchange.

The shares soared more than nine percent in early trading, before closing at 290 yen, up 3.20 percent. 

There were growing worries that Toshiba, one of Japan's best-known firms, may not make Thursday's deadline to supply financial statements for the fiscal year ended in March, as it was at odds with its auditor over multi-billion dollar losses at its US nuclear unit Westinghouse Electric.

But on Wednesday, Japan's leading Nikkei business daily and other local media reported auditor PricewaterhouseCoopers Aarata plans to grant a qualified approval of Toshiba's earnings report.

In a statement, Toshiba said it had not yet received an official sign off from the auditor, but it still planned to submit its financial statements to Japanese financial regulators on Thursday.

The prospect of Toshiba meeting the deadline "brought a sense of relief" for investors, said Mari Iwashita, chief market economist at SMBC Friend Securities.

"But it is doubtful whether this rise will last long... This is one step forward but there are many more steps ahead," she told AFP.

The massive losses at Westinghouse -- largely owing to delays and cost overruns -- have raised doubts about the future of Toshiba, which is still recovering from a 2015 accounting scandal.

It is trying to sell its prized memory chip business to a consortium of US, Japanese and South Korean investors to raise money for its turnaround.

But the planned sale has faced major hurdles as Toshiba's partner in a chip factory opposed the sale in court. 

And the company is also probing whistleblower allegations that Westinghouse executives interfered with the division's accounting.

In order to stay listed on Japan's premier exchange, Toshiba needs to reverse the current situation in which its liabilities exceed assets by the end of the current business year to March 2018. 

Earlier this month, the shares were demoted from the prestigious first section of the Tokyo Stock Exchange over inadequate internal controls.