Kazuki,
Per your post http://lists.freedesktop.org/archives/immodule-qt/2004-December/000649.html Have you had any chance of looking-at/fixing lyx + qt-immodule?
FYI, I've filed a bug report in lyx's bugzilla for this too: http://bugzilla.lyx.org/show_bug.cgi?id=1830
I ask because I am the lyx package maintainer for Fedora Extras, and many users are interested this problem being resolved.
-- Rex
