In this work, we compared the styles of clothing observed from Japanese fashion and Thai fashion using colorfulness metric. To represent each country’s Kawaii fashion, we collected data based on each country’s subculture. For Thai fashion, we collected more than 600 fashion snaps from an Instagram account that sell clothes and accessories and were considered as influential accounts, each with more than 10,000 followers. For defining Japan’s subculture, we used the popular Harajuku Kawaii fashion style and the street snaps taken from Shibuya and Harajuku area. An experienced Japanese fashion researcher selected Japanese fashion images from a famous fashion styling website and individual influencer’s Instagram account. We found that there was a significant difference in colorfulness metric between Thailand and Japan. This finding indicated the color of fashion styles of both countries are different, which leads to a color preference of kawaii patterns in each culture.