Provided are a matcha richness enhancer that enhances the richness of matcha and a matcha food or beverage that contains this matcha richness enhancer. For example, provided are a matcha richness enhancer that contains leucine and an aspartic acid salt such that leucine:aspartic acid salt, by mass, is within a range of 76 to 94:6 to 24 and a matcha food or beverage that contains this matcha richness enhancer. Also provided, for example, are a matcha richness enhancer that contains leucine, isoleucine, valine, and an aspartic acid salt such that (total leucine, isoleucine, and valine):aspartic acid salt, by mass, is within a range of 76 to 94:6 to 24 and a matcha food or beverage that contains this matcha richness enhancer.