China said it was troubled by Japan's military build-up and Tokyo took aim at Beijing's military ties to Russia and its suspected use of spy balloons in the Asian powers' first formal security talks in four years on Wednesday.
The talks, aimed at easing tensions between the world's second- and third-largest economies, came as Tokyo worries that Beijing will resort to force to take control of Taiwan in the wake of Russia's attack on Ukraine, sparking a conflict that could embroil Japan and disrupt global trade.
