By Tim Kelly MIYAKO ISLAND (Reuters) - Seihan Nakazato wants the missile trucks on the base next to his melon farm to leave, but few others on Okinawa s Miyako island, he complains, are demanding that Japan s army remove such weapons, which he says would make them a target for China. We are a small community and there are lots of complicated relationships, said Nakazato, 68, standing next to one of the greenhouses he worries could be bombed. Some islanders do work for the base and others have relatives in the military. As Nakazato harvests his melons on Japan s key border outpost, Okinawa on Sunday marks 50 years since the United States ended its occupation, raising hopes of a return to normality after its devastation in World War Two. But the East China Sea island chain, which, along with Taiwan, hems in Beijing s forces, fears it will become a battlefield again. We are worried about statements by national lawmakers that a Taiwan contingency would be a Japan contingency, and recent di