The inventors of this invention have conducted the search for a variety ofcompounds which may possess a desired CaSR agonist activity to thus find out asubstance capable of imparting a kokumi, which shows a more excellentkokumi-imparting effect, in particular, a kokumi-imparting effect of theinitialtaste-imparting type one, which is excellent in the stability and which caneasily beproduced at a low cost and the present invention thus provide a kokumi-impartingagent consisting of such a substance as well as a complex kokumi-impartingagentcomprising the substance and other substances possessing the CaSR agonistactivities in combination. More particularly, the present invention hereinprovides a kokumi-imparting agent consisting of .gamma. -Glu-Abu (L- .gamma.-glutamyl-L-2-amino- butyric acid) and a complex kokumi-imparting agentcomprising the foregoing substance and another substance having a CaSR agonistactivity, in combination.
