107Controversy over the inadequate presentation of Japan's colonial and wartime past in the country's history textbooks is one of the most protracted, notorious, and politically relevant "history problems" currently troubling East Asia. This article provides an overview of the controversy's evolution since 1982, situating it in changing domestic and regional contexts, analyzing its particularities and interrelations with other controversial issues, and evaluating its impacts on textbooks and societies at large. It shows how increased domestic and foreign scrutiny and contestation have triggered cycles of greater openness, conservative counterreactions, subsequent backlashes, and renewed debate in the field of textbooks and have overall contributed both to reinforcements and to reconsiderations of foreign relations in the region.