Antimonopoly investigators Wednesday searched offices of Yazaki Corp., Sumitomo Electric Industries Ltd., Furukawa Electric Co. and several other electric cable makers over suspected collusion, sources said.
The Fair Trade Commission suspects the firms of holding meetings since 2002 to decide which electric cable makers would receive wire harness orders from Toyota Motor Corp. and Honda Motor Co.
The FTC plans to look into possible collusion regarding other automakers as well.
A wire harness is a combination of electric cables to transmit electricity and sensor signals. The average midsize vehicle contains 1,500 meters of cable.
Yazaki, Sumitomo Electric and Furukawa Electric have reportedly captured 90 percent of the domestic wire harness market, which is estimated at more than ¥400 billion.