Matsushita Electric Industrial Co. and NEC Corp. are negotiating with their labor unions to postpone regular pay raises for their rank-and-file employees for six months beginning April 1, industry sources said Friday.

The companies agreed on regular salary increases earlier this week during their annual wage negotiations for the 2002 business year.

Toshiba Corp. and Fujitsu Ltd. may also make similar proposals to their labor unions, the sources said.