Being an advanced economy and a super-aging country, Japan is confronted with demographic crisis and severe labour shortages. While it has become one of the main destinations for immigration in Asia, throughout its modern history, it is also a country of emigration, although the volumes and directions have changed over time. The objective of the country report is to situate Japanese aspiring migrants’ mobilities within the mobility policy framework of six EU countries included in the AspirE project. This report analyses the entry requirements of these countries and explores the socio-legal contexts of Japanese (re)migration. The report is structured into three parts. The first part provides statistical descriptions of Japan’s population outmigration trends during the postwar era and includes associated analyses. It offers an overview of emigration flows from Japan to various destinations, including the six selected countries of the AspirE project. The second part examines the mobility regime in Japan from the end of World War II to the present day. It reviews how state-led emigration policies in Japan up to the 1950s have given way to other forms of migration, particularly those driven by corporate and individual initiatives. The third part of the report offers a comparative analysis of entry requirements in the six selected EU countries within the six policy arenas, shedding light on the differences and similarities in mobility policies across these nations.