This study examined whether gender differences in self-rated personality traits are context dependent. Japanese university students rated themselves on positive and negative aspects of agency (masculine) and communion (feminine) traits in three comparative conditions: between-gender, within-gender, and control conditions. Results indicated that men perceived themselves as less feminine with regard to the positive aspects of communion than women in the intergroup comparison condition. Men in the intergroup condition had significantly lower ratings for the positive aspects of communion, compared to those in the other two conditions; however, these ratings were provided only by men with low social dominance orientation. Additionally, no significant differences were observed among women. Thus, the gender self-stereotyping process among men was discussed.