English-medium degree programmes are one of the trends within the internationalisation of higher education in Japan. The recent university internationalisation project, Project for Establishing University Network for Internationalization, or Global 30 is a good example. English-medium degree programmes attract a larger and more diverse international student population to study in Japan and create an on-campus international learning environment for both local and international students. This article aims to shed light on what attracts Japanese students to such an on-campus international learning experience and the kinds of challenges they face in taking English-medium courses. The results of my research show that English as a medium of instruction is a good tool to attract Japanese students, but the quality and relevance of what is being delivered are also significant. Japanese students are willing to challenge themselves in a different learning environment, but they tend to do so without seeking support, which in turn limits their learning.