In this paper, we examine compound accents in the Daegu and Gyeongju dialects of Korean and the Tokyo dialect of Japanese, and discuss the factors that determine compound accents. The results show that the Daegu　and　Gyeongju accent of compound nouns is of the "posterior element-determining type" in which the accent of the compound is determined by the posterior element, either because the front and rear elements are both of the word-final accent type in which only the final syllable appears high, or because the front element is of the word-final accent type and the rear element is of the word-initial accent type in which only the initial syllable appears high. accent, where the front element is word-final and the back element is word-initial accent, where only the initial syllable is raised. In other cases, the accent of the compound is determined by the front element. In contrast, in the Tokyo dialect of Japanese, the accent of compound words is regularly determined by the properties of the posterior elements. In particular, when the back element of a compound has three or more moras, the accent is determined mainly by the number of moras of the back element and the type of accent, and the front element is not involved.