What’s in the Japan-Philippines Maritime Patrol Near the South China Sea?


Early this week, Japan and the Philippines conducted what was characterized by some as a joint maritime patrol near the South China Sea. While few specifics have been publicly disclosed, the engagement has nonetheless once again put the spotlight on the defense relationship between the two countries amid continued troubling developments in the South China Sea.

As I have noted before in these pages, though Japan-Philippines defense ties are by no means a new story, cooperation has been advancing significantly over the past few years and has continued to do so despite the initial challenges posed by the rise of Philippine President Rodrigo Duterte. Japan-Philippines defense cooperation has been growing over the years across various aspects, including not just defense equipment and transfer, but also critical capacity-building (See: “Japan-Philippines Defense Relations Under Duterte: Full Steam Ahead?”).

One of the areas in which this collaboration has played out has been in the South China Sea, where China’s continued militarization and control continues to pose serious concerns for the region (See: “Beware the Illusion of China-Philippines South China Sea Breakthroughs”). A case in point has been the donation by the Japanese Maritime Self Defense Forces (JMSDF) of five Beechcraft TC-90 trainer aircraft to Manila, which was the first instance of Japan transferring excess defense equipment to another country free of charge following ongoing changes in its domestic laws. The transfer of the aircraft has been a major boost for the Philippines given its previously limited ability to conduct regular and extensive patrols in the South China Sea, and Manila began publicly disclosing its deploying of the aircraft there starting in February (See: “New Military Aircraft Puts Japan-Philippines Defense Ties in the Spotlight”).