This article examines the national-cultural and linguistic features of expressing emotions in the Japanese language. It analyzes the role of the Japanese mentality, specifically the principle of "Wa" (harmony), and the concepts of "Honne" and "Tatemae" in controlling and indirectly expressing emotions during the communication process. Furthermore, the article highlights the lexical and grammatical formation of human feelings through onomatopoeic units unique to Japanese (Giseigo and Gitaigo), as well as the psychological phenomenon of "Amae." The research provides a scholarly basis for the significance of silence (Ma) and non-verbal communication within the Japanese emotional culture.