The factor structure of Japanese adolescents' body build stereotypes was assessed through having 90 males and 90 females, enrolled in Japanese public junior high schools, attribute 56 verbal checklist items to stimulus pictures of a male Endomorph, Mesomorph, and Ectomorph, respectively. The attitudinal factor structure of the two sex groups was markedly similar, and with bath adolescent groups a positive Mesomorph factor and negative Endomorph and Ectomorph factors were found. These Japanese adolescent factor structures were compared to corresponding data obtained with American adolescent males. Intercultural continuity was evidenced by similar evaluative valences being associated with corresponding body build factors, and by high Intercultural factor congruence coefficients. However, there was evidence for intracultural disparity between these Japanese adolescent data and previous studies of the body build stereotypes of Japanese adults. Possible sources of these differences were suggested, along with empirical ways to substantiate these suggestions.