aptitude is a package manager with a number of useful features,
 including: a mutt-like syntax for matching packages in a flexible
 manner, dselect-like persistence of user actions, the ability to
 retrieve and display the Debian changelog of most packages, and a
 command-line mode similar to that of apt-get.
 .
 This package contains the Japanese version of the aptitude user's
 manual in HTML format.