The document discusses Japan's political relations with East Asia. It analyzes how structural factors like the legacy of Japanese colonialism, Cold War bipolarity, and regional fragmentation created barriers for interaction. During the Cold War, Japan normalized relations with China and South Korea but territorial and historical issues remained. In the post-Cold War era, Japan strengthened economic ties in the region but tensions with China increased due to military issues and nationalism. Relations with South Korea also saw tensions due to historical disputes. Japan developed political and economic links with Southeast Asia based on norms of Asianism and developmentalism.