The purpose of this paper is to test the role of vowel contrast in V-to-V coarticulation. Specifically, V-to-V anticipatory and carryover coarticulations in Korean and Japanese were examined in terms of F1 and F2 in crowded vs. non-crowded regions of the vowel space. The results showed that the vowel contrast does not directly contribute to the language-specific coarticulation pattern between these two languages, which is at odds with Manuel & Krakow (1984), and Manuel (1987), but in good agreement with Bradlow (1995).