It's nice that the Japanese still recycle a bunch of their ship names. I only wish the US Navy did more of that, especially on the larger ships.
In the old days for the USN, the naming conventions were: CV/CVL: Wide ranging. Named after battles or old ships from early in the USN's history. BB: States CA/CL/BC (Battlecruisers): States, cities DD: Wide ranging, oftenly using USN/USMC members for gallant sacrifice and awards. SS: Sea creatures ("Gato" just sounded too cool)
Now? SSBN (Ballistmic Missile Subs): States, which is quite proper considering how much world-killing firepower they possess SSN: Cities CV/CVN: Politicians, famed Admirals Cruisers (crazy variety over the years): Cities, battles DD: Same traditional naming convention, to include even some famed Admirals LHDs: Battles
Not keen on the idea of the USN naming its largest, most prominent vessels for political leaders. Some even named not after Presidents. Wish the USN just went back to Battles and old ship names that had performed well. Enterprise is at least coming back. But not Essex, Yorktown (until her sinking just after Midway, she was THE star performer for the USN in WWII, took severe damage before Midway yet repaired just in time to go fight at Midway), Hornet. Famed Admirals should also be represented more, and into CVs again. Nimitz got his though, a fabulous line of ships to boot!
