/usr/share/ubiquity-slideshow/slides/l10n/ja/ is in ubiquity-slideshow-edubuntu 113.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ubiquity-slideshow/slides/l10n/ja/accessibility.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/arkose.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/calc.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/calibre.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/desktop-software.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/documentation.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/edubuntu-menu-editor.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/empathy.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/epoptes.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/fonts.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/freemind.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/gbrainy.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/installing-software.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/kdeedu.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/librecad.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/tomboy.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/underthehood.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/vym.html
/usr/share/ubiquity-slideshow/slides/l10n/ja/welcome.html