I crunched some numbers in regards to the fleet size comparison between China and Japan. It surprised how powerful the "Self Defense Force" was. They are even bigger than the USN presence in the Western Pacific.
At this stage, since both China and Japan don't have super-large service combatants, the most powerful vessels are the destroyers. (Helicopters don't count, they are only good for ASW, service ships can easily knock them down).
Japan currently has 23 destroyer class ships that are above 6000 tons (full load), with 3 more currently being built. On the other hand, China only has 18 in service with more on the way. Although China is catching up quickly in terms of numbers, but the tonnage of the new 052C's are still really small compared to the Atagos and Kongos. The highest prediction of 052C's tonnage is about 7500 tons, but Kongo is 9500 and Atago 10000+, probably close to 11000 tons.
China should really launch its new generation of ships.
You seems to forget the included the 054A frigate...