A Japanese Navy submarine makes a port call in the Philippines, the first in fifteen years, in a show of growing military cooperation amid tension triggered by China's growing assertiveness in the South China Sea. It was escorted into the former U.S. Naval Base at Subic Bay by two Japanese destroyers on a tour of Southeast Asia.
The Philippines asks the International Court of Arbitration at The Hague to invalidate China's claims to virtually all of the South China Sea. The hearing was attended by observers from Indonesia, Japan, Malaysia, Thailand, and Vietnam.
China's defense ministry criticizes the United States for allegedly increasing tensions in the Asia-Pacific region by increasing its military presence and supporting Japan, the Philippines and Vietnam in longstanding territorial disputes.
Taiwan plans to expand a pier on one of the disputed Spratly Islands, parts of which are also claimed by Vietnam, Brunei, China, Malaysia and the Philippines, as the other claimants strengthen military deployment in the South China Sea.