Aug Nishizaka is a Professor Emeritus at Chiba University. He has been focusing on perception in interaction. He has also published studies referencing membership categorization devices (MCD) as a machinery that generates a specific feature of the interaction or enables the management of agreement and disagreement: “The interactive constitution of interculturality: How to be a Japanese with words” (1995), “Doing ‘being friends’ in Japanese telephone conversations” (2012), and “Partitioning a population in agreement and disagreement” (2021). He has also translated one of Harvey Sacks’s seminal papers on MCD, “An initial investigation of the usability of conversational data for doing sociology,” into Japanese.