This assumption [that hat there is a single correct form of Japanese and that deviations from it signal deficiency] is tied to a 20th-century ideology that equates one language with one nation. Japan has no legally designated official language, yet Japanese functions as a national symbol by convention. The very idea of "the Japanese language" and "the Japanese people" resembles what political scientist Benedict Anderson described as an imagined community — a collective identity sustained through shared narratives, including language. Language, however, does more than bind people together. It also draws boundaries. In Japan, this often hardens into an implicit equation — to speak Japanese is to be Japanese. Scholar Hazuki Segawa refers to this dynamic as "Japanese-language nationalism." Segawa's research on Japanese-language education under colonial rule in Taiwan, Korea and parts of China shows how language functioned as a tool of assimilation and governance, shaping political identity and regulating belonging.