In Windows95/Windows98 Japanese version,
Graphics2D can't draw HALFWIDTH-KATAKANA(\uff60-\uff9f).
It seems only a dot.
and, LATIN-1 Supplement(\u00a0-\u00ff) doesn't be displayed correctly.
So, you cannot see HALFWIDTH-KATAKANA character on swing component.

but, if the antialias attribute is on, all characters are displayed correctly.