Different in quality or nature; heterogeneous; unlike in character.
異質な文化が混ざり合う街だ。
It's a city where different cultures mix.
その二つの考え方は異質で、簡単には調和しない。
Those two ways of thinking are of different natures and don't easily harmonize.
異質の要素を取り入れて新しいデザインを作った。
I created a new design by incorporating heterogeneous elements.