mozc-utils-gui is now the last thing keeping Qt in Ubuntu main. It would make things easier for both the Canonical Security Team and the community Qt/Kubuntu/Lubuntu maintainers if Qt could be demoted to universe.
mozc-utils-gui provides extra configuration options for the Japanese mozc input method released by Google.
Ideally, someone would port the utility over to a more native implementation in GNOME.
But even if no one does that work, I am proposing that we drop mozc-utils-gui from main starting in Ubuntu 19.04. This would mean that it would longer be available by default in the live ISO and it would (probably) not be automatically installed for Japanese users. I expect we would still keep ibus-mozc in the live ISO and part of the default Japanese install.