This is the APT repository owned and maintained by epii.

Please use at your own risk.

I, Instructions
  1, Add apt-line
      $ sudo wget http://archive.epii.jp/sources.list.d/epii-archive-`lsb_release -sc`.list -O /etc/apt/sources.list.d/epii-archive-`lsb_release -sc`.list
    Notice: replace RELEASE with your current ubuntu version (such as "lucid" or "precise").
  2, Add my public GPG key
      $ sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 44869F122BE46ED5336E6F68EB946CB114394B39
  3, Update your system
      $ sudo apt update
    Notice: you can of course use "apt-get" command instead.