Chinese Foreign Minister Wang Yi says Japan has "crossed a red line” with comments by the country's new leader suggesting a potential military intervention over Taiwan

Japan's intention to deploy offensive weapons near China's Taiwan region requires high vigilance from the international community, Chinese foreign ministry spokesperson Mao Ning said on Monday.

Japanese Defense Minister Shinjiro Koizumi visited Yonaguni Island — which is only around 110 kilometers away from the island of Taiwan — on Sunday and sought understanding from the locals over a plan to place the missiles there.

As China reportedly mulls a ban on Japanese seafood amid a standoff between the Asian neighbors, Taiwan's leader shows support for Tokyo, with his lunch.

China is trying to impose economic costs on Japan for wading into the issue of Taiwan. But experts say the escalating dispute could ultimately hurt China too.

China will suspend imports of Japanese seafood, according to ABC News partner NHK, escalating a diplomatic dispute triggered by Japanese Prime Minister Sanae Takaichi’s recent comments suggesting Tokyo could take military action if China attacks Taiwan.