This article discusses the validity of the incorporation of online communication in language education classes as a practice free of power politics. By examining blog activities in an advanced-level Japanese-as-a-Foreign-Language classroom at a university in the USA, we show that the blog's postings and readers' comments evoke certain modes of governmentality--practices that shape one's conduct--and define the space of a particular blog. This article illustrates two kinds of space created in blogs: that of language education in which "native speakers" dominate "non-native speakers"; and that of information exchange with less fixed relations of dominance, although participants' behavior is regulated nonetheless. We suggest involving students in analyzing blog comments so that they can understand, and respond to, how the mode of governmentality works outside the classroom and how to transform relations of dominance that manifest themselves in online spaces.