Greetings.

I wonder if there is this kind of feature. As I am typing Japanese, for
Kanji characters, I want to add the hiragana above it to make reading easier.
Generally (for those who do not know much about Japanese), I want to add
smaller characters above the main words. Is there such kind of feature?

I want the main words to remain its original size, but I just want to add
smaller characters above them. By the way I am using Microsoft Word 2002.