Sanae Takaichi warned Japan could respond militarily if China blockaded or attacked Taiwan, describing such a scenario as an existential threat and prompting confirmation of missile deployment on Yonaguni Island.Beijing condemned Takaichi's statements, accused Japan of provocation, and announced countermeasures, while China's Wang Yi denounced her comments as crossing a "red line" and filed a protest at the UN.The situation escalated as China banned all Japanese seafood imports, canceled cultural events, and warned of possible military action without UN approval, causing significant tourism losses and raising regional tensions.