Sony on Thursday posted a full-year loss of $5.7 billion as the Japanese electronics giant embarks on a massive restructuring plan in a bid to turn a profit after years in the red. The 456.66 billion yen ($5.7 billion) loss for the fiscal year to March comes after Sony said last month it would cut about 10,000 jobs and spend nearly $1.0 billion on a corporate overhaul that its new chief described as "urgent."