This article discusses the impacts of the East Asian Leaders Program (EALP) organized as a trilateral collaborative educational program participated by students from Japanese, Chinese, and Korean universities. The East Asian Leaders Program has been operated under the CAMPUS Asia initiative led by the governments of the three countries, aiming at cultivating talents who contribute to promoting mutual understanding between the three countries. The empirical analysis of this study was designed by a mixed method approach collected from 16 Japanese students. The results showed that the East Asian Leaders Program has cultivated students' attitudes and skills for mutual understanding, including acceptance/willingness to understand, ability to consider different perspectives, self-expression and assertion, and initiative and resilience. As this study indicates that the East Asian Leaders Program is effective for fostering students' attitudes toward mutual understanding, further policy development should consider encouraging universities to develop such practices to increase intra-Asian student mobility as an alternative strategy for the internationalization of higher education.