The inventors of this invention have conducted the search for most of variational compounds which may possess a desired CaSR agonist activity to thus find out a substance capable of imparting a kokumi, which shows a more excellent kokumi-imparting effect, in particular, a kokumi-imparting effect of the initial taste-imparting type one, which is excellent in the stability and which can easily be produced at a low cost and the present invention thus provide a kokumi-imparting agent consisting of such a substance as well as a complex kokumi-imparting agent comprising the substance and other substances possessing the CaSR agonist activities in combination. More particularly, the present invention herein provides a kokumi-imparting agent consisting of ³ -Glu-Nva (L- ³ -glutamyl-L-norvaline) and a complex kokumi-imparting agent comprising the foregoing substance and another substance having a CaSR agonist activity, in combination.本發明係有關於探討找出許多具有CaSR激動劑活性之變異化合物，以找出具有優異之可賦予濃厚味作用，尤其找出具有起始味型之可賦予濃厚味作用，且可以安定性地簡便地可以在低成本下生產出可賦予濃厚味之物質，自該物質提供可賦予濃厚味用劑，以及由該物質與其他具有CaSR激動劑活性之物質所成可賦予複合濃厚味用劑為目的者。即由γ-Glu-Nva(L-γ-麩胺醯基-1-戊胺酸)所成可賦予濃厚味用劑及在該物質中再倂用其他具有CaSR激動劑活性之物質所成複合濃厚味用劑者。
