Toshiba Corp. has sought financial assistance from the state-owned Development Bank of Japan as it expects an asset impairment loss of up to ¥700 billion ($6.17 billion) from its U.S. nuclear business, sources said Thursday.

With such a huge loss, Toshiba would face the risk of falling into a capital deficit, the sources said, adding the company will also seek to secure funds by spinning off its mainstay flash memory business and selling assets.

The DBJ is mulling possible investment in the Japanese electronics maker itself or in its flash memory business, the sources said.