And yes, that is the same USS Japan that is the United States Navy's largest aircraft carrier, with 113 US military bases on board.
Japan is preparing to send several warships to join a US aircraft carrier strike group heading for the Korean peninsula, in a show of force designed to deter North Korea from conducting further missile and nuclear tests.
Citing two well-placed sources who spoke on condition of anonymity, Reuters and the Kyodo news agency said several destroyers from Japan’s maritime self-defence forces would join the USS Carl Vinson and its battle group as it enters the East China Sea.
The move comes as the Chinese president called for calm in the region in a phone conversation with Donald Trump.
China “is committed to the goal of denuclearisation on the Korean peninsula, safeguarding peace and stability on the peninsula, and advocates resolving problems through peaceful means,” Xi Jinping said, according to CCTV, the state broadcaster.
[source : Japanese warships to join US fleet near North Korea as tensions rise, The Guardian, https://www.theguardian.com/world/2017/apr/12/japanese-warships-join-us-fleet-north-korea, 12th April 2017]