The MBIS Model United Nations (MUN) program and General Assembly has been a core component of academic life at the school since 1986. It is one of the longest-running MUN conferences in Japan. Well-recognized, and typically attended by over a hundred delegates from international schools throughout Japan and abroad. The General Assembly has regularly attracted local and national media attention.

As an integral part of the Social Studies curriculum, students meet throughout the school year to discuss current international issues and learn critical skills, such as conflict resolution, compromise, and media literacy, alongside fundamental skills, such as resolution writing, parliamentary procedure, caucusing, and debate.

Students prepare for the conference by researching the social, political, and economic situation of the country they represent. As well, as students become familiar with the unique role of their country within the global community as well as their country’s national interest. 

The Conference is held in February and is an intense two-day event. Delegates debate global issues and strive to achieve a balance between the needs of the nation they represent, and the overarching needs of the world as a whole. They address a range of global problems and are faced with a high-stress emergency crisis. Outstanding delegates are recognized and honored at the end of the assembly.