$ sudo apt-get update
$ sudo apt-get install emacs-mozc-bin 

emacs-mozc-bin is installed in your system.

Make ensure the emacs-mozc-bin package were installed using the commands given below,

$ sudo dpkg-query -l | grep emacs-mozc-bin *

You will get with emacs-mozc-bin package name, version, architecture and description in a table

emacs-mozc-bin package basic information: