NTT Corp. said Friday its net profit jumped 2.8-fold to a record 643.86 billion yen for the year through March, helped by strong earnings at its mobile phone unit, NTT DoCoMo Inc.

Yet, Japan's largest telecommunications company expects a fall in revenue and profit for the current fiscal year, as its fixed-line phone business continues to lose its clients to Internet telephony.

"DoCoMo logged increased revenue and profits, driven by its i-mode business, and NTT East and West made solid progress in their cost-cutting efforts," Norio Wada, NTT president and chief executive, told a news conference.