Abstract: Under the framework of international cooperation in the safeguarding of Intangible Cultural Heritage, the protection of Chinas festival heritage requires an international research perspective. The ethnography of overseas festivals is the reflection of the exchange, interaction, and construction of identity of multicultural festival spaces by placing festival heritage in an international context. The study of the Kunchi Festival in Nagasaki Japan can be conducted from the perspective of overseas ethnography of the festival, and the process of blending and interacting between Japanese local culture and traditional Chinese culture can be deeply described. Through the analysis of the core rituals, organizational practices, and constantly evolving celebration activities of the Kunchi Festival, the characteristics and functions of cultural interaction between different historical stages and regional communities can be presented clearly, thereby highlighting the function and utility of festival heritage in constructing cultural identity and national identity. The new community structure relationship, efficient operation mechanism, economic production efficiency and multidimensional cultural identity construction path formed in the practice of safeguarding festivals heritage are worth being examined about its successful experiences and models, so as to provide reference for Chinas festival heritage protection.

Key words: overseas ethnography, festival heritage, Nagasaki Kunchi Festival, intangible cultural heritage, safeguarding