China Files UN Complaint, Warns Japan over Taiwan Comments

China has lodged a formal complaint at the United Nations against Japan, accusing Tokyo of signalling potential military involvement in a Taiwan conflict and warning that Beijing will respond if challenged.

Chinese U.N. Ambassador Fu Cong submitted letters to U.N. Secretary-General António Guterres criticising Japanese Prime Minister Sanae Takaichi’s recent remarks. Takaichi had said that a Chinese attack on Taiwan could qualify as “a situation threatening Japan’s survival,” which would allow Japan’s Self-Defence Forces to operate under its security laws.

Fu said Japan’s position amounted to interference in what Beijing considers an internal matter. He added that any Japanese attempt to intervene militarily would be regarded as “an act of aggression,” and stated that China would exercise its right to self-defence under the U.N. Charter.

• China files UN complaint accusing Japan of threatening military intervention over Taiwan
• Beijing warns it will exercise self-defence if Tokyo intervenes in the cross-Strait situation
• Rising China–Japan tensions spark fresh concerns over East Asian stability and regional fallout

Japan rejected the accusation, calling China’s complaint “unacceptable.” Tokyo said its statements were consistent with its laws and security responsibilities and denied any intention to provoke China.

The clash has already spilled into economic and cultural arenas. China has begun certain trade-related actions, and multiple Japanese music events in the country have reportedly been cancelled. Chinese officials described the dispute as the most serious downturn in bilateral relations in years.

Beijing cited wartime history and post-World War Two documents—including the Cairo and Potsdam Declarations—to reinforce its claim that Taiwan is part of China, while Japan maintains it follows a legally defined defensive posture.

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The exchange adds new tension to East Asia, where concerns about the stability of the Taiwan Strait remain high. Analysts note that the sharp tone from both governments suggests the dispute could widen if neither side steps back