Nikkei eases as euro fears spur profit taking

* Hitachi sags after cutting forecast * Japan Airlines gains, f'cast hike offsets Dreamliner losses * Fast Retailing weighs after poor January sales By Sophie Knight TOKYO, Feb 4 (Reuters) - Japan's Nikkei share average dropped in early trade on Tuesday as investors took signs of strife in peripheral euro zone countries as a cue to lock in profits following five straight days of gains. Hitachi Ltd was in the firing line, shedding 5.6 percent after the industrial machinery fi