$ sudo apt-get remove japitools 

Uninstall japitools including dependent package

If you would like to remove japitools and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove japitools 

Use Purging japitools

If you use with purge options to japitools package all the configuration and dependent packages will be removed.

$ sudo apt-get purge japitools 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove japitools 

See Also,