生せい産さん年ねん齢れい人じん口こうせいさんねんれいじんこうMeanings1nounworking-age populationDemographic term for the segment of the population typically considered able to work, often defined as ages 15–64.日本にほんの生せい産さん年ねん齢れい人じん口こうは減げん少しょうを続つづけている。