NTT Communications Corp., the long-distance and international services arm of the NTT group, plans to enter the local-call market as early as May, company officials said Thursday.

Because rival carriers are preparing to launch comprehensive services combining local, long-distance and international services, NTT Communications has concluded that it needs to offer a wider range of services.

Within the NTT group, headed by holding company Nippon Telegraph and Telephone Corp., NTT East Corp. offers local phone services in eastern Japan while NTT West Corp. covers western Japan.