Rakuten Mobile Inc. rolled out its ultrahigh speed 5G mobile internet service Wednesday at less than half the price offered by Japan¡¯s three mega-carriers.

The company, which only debuted as the fourth mobile communications operator in April, is still far behind the three mobile giants ¡ª NTT Docomo Inc., KDDI Corp. and SoftBank Corp.

But the bold price plan could give Rakuten a competitive edge and fuel the momentum toward cheaper phone fees amid pressure from Prime Minister Yoshihide Suga to slash service charges.