http://bugs.winehq.org/show_bug.cgi?id=18349
--- Comment #8 from Dmitry Timoshkov dmitry@codeweavers.com 2009-05-06 07:56:52 --- The point is that Wine neither renders fonts (Freetype does that), nor provides CJK fonts. So the problem with fonts quality is outside of Wine.
Both using Freetype with enabled TT bytecode interpreter, and installing Windows CJK fonts will get that 2 things more close to Windows. Although as I said many times even Freetype with enabled TT bytecode interpreter doesn't work very well sometimes, especially with so complex fonts as the CJK ones are.