Using the ethnography of communication and speech codes theory, this inquiry tries to capture instances in which individuals’ views of fit conduct and cultural boundaries are undergoing change in intercultural interactions. The article presents a way of describing such instances by elucidating Japanese speakers’ experiences of encountering unfamiliar codes in problematic situations with English speakers in the United States, recognizing boundaries, negotiating contrasting codes, and revising their perceptions of codes and boundaries as a result of engaging in remedial episodes. The inquiry illuminates the dynamic nature of the boundaries of speech communities and adds an ethnographic exploration of intercultural communication.