TOKYO, April 16 (Reuters) - Japanese stocks were expected to drop o n Monday, tracking a global pullback on renewed concerns about Europe's debt crisis after rising bond yields in Spain and a record-high cost of insuring the country's debt against default spooked investors. Market players said the benchmark Nikkei average was likely to trade between 9,450 and 9,600 on Monday after Nikkei futures in Chicago closed at 9,530, down 110 points or 1.1 percent from the Osaka close of 9,640. "Europe's sovereign debt problems continue to be a concern.