A subcommittee of a key government advisory panel on Thursday urged "effective independence" for NTT DoCoMo Inc. from its parent, Nippon Telegraph and Telephone Corp., if sufficient competition fails to form in the nation's telecommunications market.

In its interim report, the special committee under the Telecommunications Council, an advisory panel for the minister of posts and telecommunication, also called for introducing regulatory incentives for the hitherto dominant NTT group to take measures to promote competitions.

The report argues that the NTT holding company's stake in the NTT DoCoMo and NTT Communications Corp. should be reduced so that the two firms can secure virtual management independence.