In this study, I examined two conversation styles, casual conversation and debate, and conducted a comparative analysis of the use of the sentence-final particle ‘YONE’ by native speakers in interactional contexts. As a result, it was found that ‘YONE’, which serves as an expression of empathy, is frequently used in both conversation styles as a common feature. The difference lies in the significant prevalence of the confirmatory function of ‘YONE’ in casual conversation, whereas in debate, there is a higher frequency of both agreementseeking and information-providing functions. From the observed ratio of each function in casual conversation and examples of conversations, it was found that by using the confirmatory and empathetic functions of ‘YONE’, speakers confirm their understanding with their interlocutors, ensuring the accuracy of their own perceptions while building a shared understanding. On the other hand, in debate, when there is agreement with the interlocutor, speakers actively use the agreement-seeking function of ‘YONE’ to facilitate consensus. Even in cases of differing opinions, speakers utilize the information-providing and empathetic functions of ‘YONE’ to demonstrate understanding of the interlocutor’s position while presenting their own opinions.