Nikkei reported earlier that SoftBank said it is considering cutting fees.

Last week, NTT announced that it would take the country's top telco NTT Docomo private in a deal it said would give the capacity for cuts.

Suga has called on wireless carriers to reduce prices, with the government hoping resultant savings will stimulate consumer spending elsewhere in the economy.

(Reporting by Sam Nussey; Editing by Jacqueline Wong and Ana Nicolaci da Costa)