After reading in an answer to another question that Japanese adjectives are less inflected than Japanese verbs I'm wondering if there are inflections that can be applied to verbs but not i-adjectives? Or what about the converse?
Most of the verb endings cannot be applied to adjectives.
There are no modern potential, passive, causative, or imperative suffixes:
Also, politeness of adjectives is encoded by the copula, and not by polite verb endings:
In fact, the only endings that adjectives can really have are tense, negation, and the conditional mood.
I feel that that other answers are tied too much to the traditional analysis of Japanese, which is unsatisfactory from a modern academic point of view.
Contrary to what traditional grammar says, i-adjective does not inflect on its own. All there is is the
The most opaque one is the plain form, the derivation of which is controversial:
Other than this, the form of i-adjectives without
Since all the conjugation of i-adjective is actually due to the help of the verb
Here, the reason
I want to add a few extra notes to Amanda's answer:
There are two different vector we should consider when comparing the coverage of i-adjective conjugation to the verb conjugation (which is obviously richer):
The interesting categories that are not expressible by verbs are actually these, as I see it: