Sexuality is part of every culture; however, one's openness to communicating about sex may differ among countries. Following a literature review, an online survey collected quantitative and qualitative data from 77 Japanese international students' attending higher education institutions in the United States. The participants were asked to report how frequently they engaged in sexual communication and how comfortable they were discussing sexual topics while living in Japan and after moving to the U.S. The 10 sexual topics included Pregnancy, HIV/AIDS, Menstruation, Birth control, Sexual activities, Masturbation, Abortion, Dating/relationship, Sexual orientation, and Premarital sex; and 5 target individuals included Mother, Father, Friends, Significant others and Professionals (doctors, nurses, and counselors). Major focus of quantitative investigation included the effects of gender, countries, targets of communication, length of stay in the U.S. and acculturation styles on the frequency of and level of comfort in sexual communication. The qualitative investigation focused around perceived differences in sexuality between Japan and the U.S. and whether their attitude toward sexuality changed after moving to the U.S. The quantitative results indicated that, in the aggregate, there was no significant differences in the overall frequency of sexual communication between genders and between the two countries, albeit a near significant gender trend (women communicating more frequently than men) in the U.S. but not in Japan. However, there was a statistically significant preference for the participants to communicate with peers over their parents and other target groups. As expected, the length of stay in the U.S. was found to be statistically correlated with the frequency of sexual communication; however, the age of participants was not. The qualitative investigation revealed 68% of female and 52% of male participants having positive views of sexuality in the U.S., including experiencing American as more open and accepting. Over 80% of the reported changes in understanding of sexuality were positive, and women were more likely than men (39% and 19%) to report positive changes, including increased appreciation of their own sexuality and gender identity, and increased contacts and respect for sexual minorities. Finally, potential explanations of the findings, limitations of the present study was discussed, and implications and contributions of the present findings for individuals who serve Japanese international students and fort future studies were discussed.