Migrations and diversifications in the UK and Japan.

Japan and the UK are long-established countries of immigration which although having different histories both share experience as colonial powers which have shaped their somewhat hostile attitudes towards migration alongside a need for migrant labour and negative public attitudes towards migrants. This paper sets the context to the Special Issue of the same name. It examines the migration and diversification histories and scholarships of Japan and the UK identifying common themes as well as divergences noting the ongoing diversifications of populations in both countries albeit on different scales. It then examines the key features which shape processes underpinning the emergence of superdiversity: super-mobility, and the scale, speed and spread of diversification, arguing the need to think about such processes outside of UK and Europe and considering the ways in which shifting scholarly gaze of superdiversity researchers to Japan can address some of the critiques of its Western-centric bias. The paper then outlines four main themes in superdiversity research setting out how they are addressed in this special issue before describing the key contributions of the ten papers which form the content of the collection. [ABSTRACT FROM AUTHOR]