China denounced remarks by Japan and the European Union ‌about the South China Sea at a U.N. Security Council ⁠meeting on Monday and ⁠accused Tokyo of provocative behavior in the Taiwan Strait and planning military expansion.

Ayano Kunimitsu, a Japanese vice foreign ⁠minister, told the Council meeting on maritime security that Tokyo was seriously concerned about the situation in the East China and South China Seas and reiterated Japan’s opposition to ‌any attempt to change the status ⁠quo by force and obstruction of freedom of ​navigation and overflight.

Stavros Lambrinidis, head of the EU delegation to the United Nations, also highlighted South China Sea tensions, saying they hindered a critical shipping route and challenged the rules-based international order. Neither mentioned China – which claims most of the South China Sea and disputes territory with Japan and in the East China Sea – by name.

China’s deputy U.N. ambassador Sun Lei called the Japanese remarks “unwarranted,” saying they “completely confound black and white.” He added that the EU representative should “refrain from issuing unsubstantiated and irresponsible remarks on the South China Sea ⁠issue.” “In reality, ​the situation ​in the East and South China ‌Seas remains stable overall and the South China Sea stands as one of the freest shipping ‌lanes in the world,” Sun said.

He accused Japan of recently sending vessels “to flex ​their muscles and deliberately provoke tensions in the Taiwan Strait,” saying this sent a “gravely erroneous signal” to separatists in Taiwan, a democratically governed island China claims ⁠as its own.

Sun also referred to “erroneous remarks” on Taiwan by Japanese Prime Minister Sanae Takaichi last year, saying these “have dealt a severe blow to China-Japan ⁠relations.” Ties between Japan and China sank to their worst level in years after Takaichi said in November that a hypothetical Chinese attack on Taiwan could bring about a Japanese military response.

Sun charged that “right-wing forces are steering Japan’s security policy towards an offensive and expansionist posture” and that 80 years after World War Two, “a new militarism is resurging in Japan.”

He said Japan’s relaxation of restrictions on the export of lethal weapons, its deployment of offensive missiles, and increased military spending “laid bare” Japan’s intention “to pave the way for military expansion.” Japanese destroyer ⁠JS Ikazuchi transited ​the Taiwan Strait this month, a move China called “a deliberate provocation.”

China has embarked on a massive expansion of its armed forces in recent years, militarized ‌disputed reefs in the South China Sea, and engaged ​in repeated ​large-scale military exercises around Taiwan, sparking concern among countries across the Asia-Pacific region and beyond.