Donald Trump has been officially declared a loser.

[Anomalocaris]

Perhaps with the other stuff, but as pointed out above, they've been recycling WWII-era ship names for five decades. I don't think the shift in naming convention has the same significance you seem to think it has.

One could signal the acceptance of an clean break with the past and avoid names that could be controversial, or one could intentionally chose a predictably controversial name at a controversial time.  The Japanese chose the later.  

Which ship-name do you find controversial? More to the point, which ship-name has prompted any protest from any other country?

Naming any modern warship of any of the 6 carriers that took part in Th Pearl Harbor attack certainly is likely to raise eyebrows in east Asia.  In addition, resurrecting the names of any of the historically significant battleships that marked symbolic steps Japan took to attempt to achieve naval supremacy in the pacific between 1914 and 1941, such as Ise, hyuga, Nagato, Mutsu, Yamato and musashi, would also raise eyebrows.   Reusing these names are an indication, not in themselves a protestable action.  One does not protest the indication.  But it would be digested as further indication confirming perceived progress towards an worrying end, and more immediately it would contribute to heightening tensions.