Honda Motor on Thursday reported its first annual loss since becoming a publicly traded company in Japan seven decades ago, as the costly retreat from its ambitious electric-vehicle targets plunged earnings into the red. The automaker reported a net loss of $2.7 billion for the fiscal year that ended March 31. Earnings were weighed down by more than $9 billion in restructuring charges and write-downs after a retrenchment of its E.V. strategy.