Beijing suggested it might reimpose a ban on seafood imports from Japan after warning its citizens to avoid travel there and postponing the releases of at least two Japanese movies.

China is the real regional "troublemaker", a senior Taiwanese security official said on Friday, personally giving out copies of a new civil defence handbook the government is sending to every household on the island as China tensions rise.

Tension between Japan and China has escalated over the new Japanese leader's suggestion Tokyo could intervene militarily if Beijing attacks Taiwan.

From China’s point of view, the Japanese Prime Minister’s remarks on Taiwan test a red line - a trigger that sets this dispute apart from past flare-ups, analysts say.

China’s increasing military and economic pressure has forced Japan to rethink its defense strategy. Analysts reveal how Japan is modernizing its forces, strengthening alliances, and preparing for potential conflicts.