NTT Docomo Inc. said it will cut its mobile phone charges by 20 to 40 percent from the April-June quarter next year amid a call by the government for cell phone carriers to reduce their fees.

NTT Docomo will offer lower charges with new plans, under which handset payments and service charges will be separated. The move by the largest mobile carrier in Japan is expected to prompt its two major rivals KDDI Corp. and SoftBank Corp. to follow suit.

The top three mobile carriers currently offer similar packaged plans combining handset and service fees.