Japan Display Inc. is considering slashing around 4,000 jobs, about 30 percent of its total workforce, by streamlining manufacturing lines, mostly overseas, to turn around its struggling business, sources close to the matter said Tuesday.

The liquid-crystal display maker, formed in 2012 through a merger of the LCD operations of Hitachi Ltd., Sony Corp. and Toshiba Corp., incurred losses for the three fiscal years through last March.

A harsh business environment will likely continue for the company as its key client Apple Inc. is turning away from LCDs and toward organic light-emitting diode displays. Japan Display lags behind rivals in OLED development.