This document summarizes the underlying tensions between Japan, China, and South Korea related to territorial disputes and differing historical interpretations. Rising nationalism in the countries has exacerbated long-standing conflicts over islands and how to address Japan's World War II legacy. Failure to manage these issues risks undermining peace and cooperation in Northeast Asia as regional power shifts occur. Practical steps like joint resource management, people-to-people exchanges, and regional institutions could help address disputes and build confidence.