Japan has a huge ship building capability I've read. There is a great site, I'll have to go find it again, with all of the belligerents in the South China Sea's sea power listed, including China. China has built a LOT of really, really advanced ships as of late. It's frightening how far they've come since 2000 or so.
http://www.jeffhead.com/redseadragon/fac.htmI've read that China has nearly 200 Type 022 built now, extremely fast, as in give the LCS a run for its money, stealthy somewhat, ridiculous missile loadout for such a small ship....pretty scary thinking about 100 of these little buggers coming at a USN CVN group from 180 degrees...that's 800 missiles potentially incoming...even 100 would be an awful lot for the defenses to fight off 100%. And that's just one ship class, they've built an awful lot of advanced DD's and FF's as well.