Conjugational

Hiragana are used for words without kanji representation, for words no longer written in kanji, and also following kanji to show conjugational endings.

In terms of declensional and conjugational endings, the two languages have tended to innovate in divergent ways, with neither clearly simpler than the other.

The doubled middle radical is also characteristic of the present, but the forms of the D-stem use the secondary conjugational affixes, so a D-form will never be identical to a form in a different stem.