Language teaching is often seen as an ideologically neutral activity. Linguists have traditionally believed that what people say about language use or structure does not represent ‘real’ linguistic data (Schieffelin, et al, 1998:11). However, it is precisely this dismissal that modern linguistic anthropologists hope to dispel. This paper attempts to lay bare the workings of language ideology and how it impacts language teaching in general and Japanese language pedagogy in particular.The ideological orientation of what constitutes ‘standard’ Japanese language involves inclusion of certain components that are motivated by Nihonjinron discourses of ‘identity, aesthetics, morality and epistemology’ and processes of exclusion that ‘erase’ deviations from the ‘norm’ (Schieffelin, et al, 1998:3). Ideas about ‘native speaker’ understanding, selection of language materials, inclusion and exclusion of syntactical, lexical, and pragmatic forms in teaching manuals, etc., are all affected by these perspectives, some of which this paper will hope to enumerate. With concrete examples it will be demonstrated how flawed these processes are and how a critical pedagogical approach may help solve these issues.