东北亚，突变！

Group 1: North Korea's Military Developments - North Korea's missile authority conducted a test launch of a new air defense missile system, demonstrating superior combat responsiveness and high reliability [1][2] - Kim Jong-un observed the test and expressed satisfaction, indicating that the military will equip this new defensive weapon system [2] - The test involved multiple surface-to-air missiles launched towards the western sea of the Korean Peninsula, which did not violate UN sanctions [2] Group 2: U.S. Military Strategy in Japan - Reports indicate that the U.S. Department of Defense is considering canceling the plan to strengthen U.S. military presence in Japan, potentially saving $1.18 billion (approximately 170 billion yen) [1][4][5] - The cancellation could pose political risks for U.S.-Japan relations and weaken U.S. command and control capabilities in the Pacific [4][5] - The U.S. military restructuring plan is global, including proposals to abandon the NATO Supreme Allied Commander position in Europe [5][6] Group 3: Japan's Defense Initiatives - Japan's House of Representatives passed an amendment to the Self-Defense Forces Act, establishing a new permanent "Joint Operations Command" to enhance coordination among the Self-Defense Forces [5] - This command aims to improve response capabilities and deterrence in emergencies, coordinating joint operations with U.S. forces [5]