<h1>Sovereignty dispute: China demands retraction of remarks on Taiwan and warns of countermeasures including economic and maritime measures.</h1> China demanded retraction of Japanese prime ministerial remarks on Taiwan and warned that refusal would lead to countermeasures, describing the comments as wrongful interference in internal affairs and a challenge to international order. In concert with diplomatic protests and UN exchanges, China implemented measures including travel advisories, suspension of certain Japanese aquatic imports, and stepped-up coast guard patrols in disputed waters. Beijing framed Tokyo's suggestion that a Taiwan contingency could justify a 'survival threatening' response and invocation of the right to collective self-defence as grounds for its protests and potential retaliatory steps.