Murata Manufacturing Co Ltd's chief executive said rising demand for electronic components from Chinese smartphone makers could buffer any future fall in sales from its two largest customers, known to be Apple Inc and Samsung Electronics Co Ltd. Half of Murata's revenue from smartphones comes from those two companies, Chief Executive Tsuneo Murata told Reuters in an interview without identifying them by name on Tuesday at CEATEC, one of Japan's biggest electronics trade shows. "If it goes bad maybe that would be a problem.