When the Japanese start naming these carriers things like Kaga, Akagi, Hiryū, and Sōryū, then it will really be time to worry :) (1)<p>But seriously, given all of the provocations by North Korea and China, this should be expected and may even provide deterrence against others' destabilizing moves in the region. The Japanese haven't displayed any aggressive policies since 1945.<p>(1) Carriers of Battle Of Midway 1942 (<a href="https://en.wikipedia.org/wiki/Second_Carrier_Division" rel="nofollow">https://en.wikipedia.org/wiki/Second_Carrier_Division</a>)