Install gnome-user-docs-ja by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-user-docs-ja
Description:
GNOME user's guide (Japanese)
Documentation for using the GNOME desktop environment and its components. It covers usage and setup of the core GNOME programs. . This package contains the documentation in Japanese.
Homepage: https://help.gnome.org/users/
Version: 3.28.1-0ubuntu1
Section: doc