East asian literary culture is a field of academic inquiry that examines the diverse literary traditions, texts, and practices originating from and interacting across the geographical and cultural areas of East Asia, treating them as interconnected phenomena shaped by shared historical contexts and cultural exchanges. This research concept investigates the historical development, formal characteristics, thematic concerns, and socio-cultural functions of literary works within and between countries typically including China, Japan, Korea, and sometimes Vietnam. Key characteristics include its inherently comparative and transnational perspective, its engagement with classical and modern forms, and its interdisciplinary approach drawing on history, philosophy, religion, and art history. Its significance lies in providing a framework for understanding regional cultural dynamics, the mutual influences between distinct yet related literary systems, and the complex interplay of tradition and modernity across East Asia.