Good afternoon Luciano, sorry for late response; I was so suprised that it worked on your system that it make me confused. 1- I see that you don't have the same UI for selecting Japanese words in Mozc, unlike me? Why? I have the same packages as you linked. 2- I tested the adw-gtk3-dark user theme to see if this works, but no, I have the same problem. I'm clueless, because it works for you and not for me, do you have another platform to contact on so it can be easier to discuss about it? Those are the ibus packages I have installed: i | ibus | The "Intelligent Input Bus" input method | package i | ibus-dict-emoji | Emoji dictionary for IBus | package i | ibus-gtk | IBus input method support for gtk2 applications | package i | ibus-gtk-32bit | IBus input method support for gtk2 applications | package i | ibus-gtk3 | IBus input method support for gtk3 applications | package i | ibus-gtk4 | IBus input method support for gtk4 applications | package i+ | ibus-hangul | The Hangul engine for IBus input platform | package i+ | ibus-input-pad | Input Pad for IBus | package i | ibus-lang | Translations for package ibus | package i | ibus-m17n | The M17N engine for IBus platform | package i+ | ibus-mozc | The Mozc engine for IBus | package i | ibus-mozc-candidate-window | An optional candidate window for ibus-mozc | package And those are anything Adwaita: i | adwaita-icon-theme | GNOME Icon Theme | package i | adwaita-qt5 | Adwaita Qt5 theme | package i+ | adwaita-qt6 | Adwaita Qt6 theme | package i | gtk2-metatheme-adwaita | GTK+ 2 support for the Adwaita GNOME theme | package i | gtk2-theming-engine-adwaita | Adwaita GTK+ Theming Engine | package i | gtk3-metatheme-adwaita | GTK+ 3 support for the Adwaita GNOME theme | package i | libadwaita-1-0 | Building blocks for modern GNOME applications | package i | libadwaita-lang | Translations for package libadwaita | package i | libadwaitaqt5-1 | Adwaita Qt5 library | package i+ | libadwaitaqt6-1 | Adwaita Qt6 library | package i | metatheme-adwaita-common | Common files for the Adwaita GNOME theme | package ty