Japan's economic relations with East Asia have been shaped by structure, agency, and norms. During the Cold War, the bipolar structure defined Japan's ties with countries like China and South Korea. After the Cold War, a multipolar structure emerged. Japanese government agencies like MITI and corporations have driven economic expansion into East Asia through tools like FDI, ODA, and trade. Norms of developmentalism and Asianism have also guided Japan's approach. However, its alliance with the US has at times conflicted with fully embracing its Asian neighbors. The 1997 Asian Financial Crisis damaged Japan's regional standing, but it has since worked to restore its leadership role through new strategies like bilateral FTAs and regional trade agreements.