STEPS HAVE BEEN PERFORMED AND PROVEN TO WORK ON LUCID 10.04 LTS
1. Get getlibs debian package from here: http://djlab.com/stuff/getlibs-all.deb and install it using: sudo dpkg -i getlibs-all.deb
2. Install these modules using getlibs: sudo getlibs -p ibus ibus-gtk libibus1 libibus-qt1
3. Create a file named ibus-gtk.immodules (if not existing already) under /usr/lib32/gtk-2.0/2.10.0/immodule-files.d/ with the following content:
"/usr/lib32/gtk-2.0/2.10.0/immodules/im-ibus.so"
"ibus" "IBus (Intelligent Input Bus)" "ibus" "" "ja:ko:zh:*"
4. Reboot (if file in step 3 was not pre-existing)
5. Enjoy!
Special thanks to Chang Sheng Ding, Zhen Xing Han and Long Wen (my fellow Ubuntu geeks)