/usr/share/help/ja/ is in gnome-documents 3.28.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/help/ja/gnome-documents/
/usr/share/help/ja/gnome-documents/collections.page
/usr/share/help/ja/gnome-documents/filter.page
/usr/share/help/ja/gnome-documents/formats.page
/usr/share/help/ja/gnome-documents/index.page
/usr/share/help/ja/gnome-documents/info.page
/usr/share/help/ja/gnome-documents/legal.xml
/usr/share/help/ja/gnome-documents/media/
/usr/share/help/ja/gnome-documents/media/go-down.png
/usr/share/help/ja/gnome-documents/media/icon_gnome-documents.png
/usr/share/help/ja/gnome-documents/print.page
/usr/share/help/ja/gnome-documents/prob-no-show.page
/usr/share/help/ja/gnome-documents/prob-previews.page
/usr/share/help/ja/gnome-documents/search.page
/usr/share/help/ja/gnome-documents/view-add.page
/usr/share/help/ja/gnome-documents/view.page
/usr/share/help/ja/gnome-documents/viewgrid.page