Language learning is frequently justified as a vehicle for promoting intercultural communication and understanding, and language-in-education policies have increasingly come to reflect this preoccupation in their rhetoric. This paper will examine the ways in which concepts relating to interculturality are constructed in Japanese language policy documents. It will explore in particular the ways in which ideologies of nationalism and Japanese identity have an impact on understandings of the nature and purpose of interculturality and how these are developed discursively in Japanese language-in-education policy documents. Language policies construct a discourse of interculturality which focuses on the development of a nationalistic adherence to a particular conceptualisation of Japanese identity, which is unique, homogenous, and monolithic. These themes will be discussed in the contexts of Japanese policy documents relating to foreign language teaching and Japanese language spread.