Tested on RedHat Linux6.2J update with ladybird (build 1.3.1ea-b01)
Japanese characters does not display correctlly with rotate text except
horizontal right direction.
ASCII characters are displayed correctly
Please extract attached test program Testrotate_swing.java and compile.
Then execute.

#locale
LANG=ja_JP.eucJP
LC_CTYPE="ja_JP.eucJP"
LC_NUMERIC="ja_JP.eucJP"
LC_TIME="ja_JP.eucJP"
LC_COLLATE="ja_JP.eucJP"
LC_MONETARY="ja_JP.eucJP"
LC_MESSAGES="ja_JP.eucJP"
LC_ALL=