Japan has dismissed a Chinese letter to the United Nations accusing Tokyo of threatening armed intervention over Taiwan as "inconsistent with the facts and unsubstantiated".

A Japanese official blasted China’s claims that Prime Minister Sanae Takaichi has altered Japan’s position on a Taiwan crisis as “entirely baseless,” calling for more dialogue to stop ties between Asia’s top economies spiraling.

China has taken its dispute with Japan to the United Nations, sharply criticising Prime Minister Sanae Takaichi’s recent comments on Taiwan as the spat between the two neighbours deepens and tensions hit a new low.

TOKYO - A Japanese official blasted China’s claims that Prime Minister Sanae Takaichi has altered Japan’s position on a Taiwan crisis as “entirely baseless”, calling for more dialogue to stop ties between Asia’s top economies spiraling.

China sent a letter to the United Nations vowing resolute self-defense if Japan “dared to intervene militarily in the Taiwan Strait,” as Beijing tries to rally international support for its position on the spiraling spat.

Japan plans to deploy medium-range surface-to-air missiles on Yonaguni – making it a frontline of defence in the event of a Chinese attack on Taiwan – as part of its broader military build-up across the southern island chain.