Hi, I’m Lemon73 from JKUG (Japan KDE User Group).
For now, Japanese setting is a little troublesome.
In short:
- Install IME (mozc-fctix5)
- Change keyboard layout
- Change Mozc settings
Details (written in Japanese, you can use deepl or google translator): https://zenn.dev/phanect/articles/b71be371a061ff