KOBE — Local citizens' groups said Wednesday they will canvass residents door-to-door next month in order to determine once and for all whether people want a Kobe airport.

This decision by antiairport activists, who had been badly split on strategy following City Hall's rejection of a plebiscite proposal last year, came one day after the Transport Ministry gave final approval for the airport.

Construction of an artificial island in Kobe harbor, on which the single-runway, domestic airport is to be built, could begin as early as mid- September, Kobe officials said.