Japanese in Ubuntu 19.10 + Enlightenment

Language > Input Method Settings
Un-check the box and go to Setup Selected Input Method. Add any languages you plan to use. Then install anthy package using apt:

$ sudo apt install ibus-anthy

The login/logout, or restart x for the system to notice the change. Add anthy on IBus preferences (ibus-setup), and switch to that (super+space).

Done!