See /usr/X11R6/share/doc/ja/rxvt/README.ja for more information about using Japanese XIM. If you want to enjoy menuBar features, add following 2 line Rxvt*path: /usr/X11R6/lib/X11/rxvt/ Rxvt*menu: ja to your ~/.Xdefaults. Documents are at /usr/X11R6/share/doc/ja/rxvt/.