Well-known Chinese news site Sina recently reported that several frigates from the Japanese Maritime Self-Defense Force joined the U.S. Carl Vinson aircraft carrier battle group, which has been conducting the U.S.-South Korean military exercises. The Japanese participation lasted four days. It is very rare for Japanese military vessels to join forces with U.S. aircraft in the East China Sea. Apparently, Japan is gaming its luck to threaten China again. According to Japanese media, this joint exercise was a temporary arrangement instead of a planned event. Japan just completed a joint exercise with the U.S. Navy near Guam. The Japanese Ground Self-Defense Force also had a joint exercise with the U.S. Marines at the same time. To add to the picture, the U.S. invited the Philippine Defense Secretary on-board the Carl Vinson aircraft carrier a few days back. All these happened a week before the new U.S. Secretary of State Rex Tillerson will start his trip to visit China, Japan, and South Korea.
Source: Sina, March 11, 2017