Hitachi booked an October-December net loss of 371 billion yen ($4.13 billion) against a 12.5 billion yen profit a year earlier. The result was also dented by a firmer yen and a writedown of deferred tax assets after taxable income across the group fell.

The company, whose products range from rice cookers to nuclear reactors, repeated its projection to post a net loss of 700 billion yen in the year to March.

Along with its big loss warning, Hitachi said last week it would exit unprofitable businesses, close plants and take other restructuring steps in a bid to cut 200 billion yen in fixed costs by March 2010.

The announcement triggered a 17 percent dive in the company's share price to a near 29-year low, adding to a 50 percent plunge since the beginning of the business year in April. The electronics machinery subindex tumbled 46 percent since April.

(Reporting by Sachi Izumi)