NEC Corp. said Thursday it will turn five domestic plants into independent electronics manufacturing service companies while selling or integrating others in a wide-ranging restructuring plan.

Of its 17 plants, excluding chip-making sites, those slated to be split into independent EMS firms, which will also accept orders from companies outside the NEC group, include factories in Gunma, Nagano and Shizuoka prefectures, NEC officials said.

NEC's Gunma factory produces personal computers, while its Nagano plant manufactures computer peripherals. Two plants in Shizuoka make mobile communications equipment.