Japan, the United States, Australia and the Philippines are set to hold a joint naval exercise on Sunday off the Southeast Asian country's Palawan Island in the South China Sea, multiple government sources said Tuesday, amid China's continuing aggressive actions.It would be the first full-scale exercise involving the four countries aimed at enhancing interoperability among their forces, the sources said. The exercise will include anti-submarine warfare training, communication drills and sailing ships in formation.In August, the same countries conducted joint training on offshore replenishme…READ FULL ARTICLE