JDK-6529796 : Support JIS X 0213:2004 in existing JDK versions, especially for Windows Vista
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed. Resolved: Release in which this issue/RFE has been resolved. Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
Windows Vista supports JIS X 0213:2004.
That's very big impact for Japanese licnesees.
However, currently, JDK does not support JIS X 0213:2004 at this point in any JDK versions.
That encoding should be supported in 1.4.2_XX, 5.0ux and 6.0ux