I have a red embroidered with the word Aikido in Kanji and it looks great!. In the way I use my belt, is always in my right side.
Before beeing Yudansha, I used a white belt with aikido in kanji in black.
In my dojo there is no roule or custom anout this,.. there are people that dont have any kanji or kana,.. my sensei uses first and last name in katakana in one end and also aikido in kanji in the other,.. i think!.
What about the Hakama?