In the latter half of this month, China has engaged in unilateral actions at sea.

On September 16, Chinese coast guard vessels engaged in aggressive behavior near Scarborough Shoal, a disputed area in the South China Sea claimed by both China and the Philippines. They fired water cannons at Philippine government vessels, causing damage and injuring one person.
On September 23, there were signs of possible new exploratory drilling by China near the median line in the East China Sea, where it has been unilaterally developing gas fields for years.

As part of diplomatic activities during the UN General Assembly High-Level Week, a trilateral foreign ministers’ meeting between Japan, the United States, and South Korea was held on September 22. On September 23, foreign ministers from eight countries in Europe and the Indo-Pacific region, as well as the G7 foreign ministers, held meetings. On September 24, a foreign ministers' meeting focused on maritime safety and stability was also held. Japan reaffirmed its commitment to cooperating with the international community in upholding a free and open international order based on the rule of law, and shared this stance with like-minded
countries.