The rajah and pasha butterflies, also known as emperors in Africa and Australia, (genus Charaxes) make up the type genus of the brush-footed butterfly subfamily Charaxinae, or leafwing butterflies. They belong to the tribe Charaxini, which also includes the nawab butterflies (Polyura, a subgenus of Charaxes). Charaxes are tropical Old World butterflies, with by far the highest diversity in sub-Saharan Africa, a smaller number from South Asia to Melanesia and Australia, and a single species (C. jasius) in Europe. They are generally strong flyers and are popular among butterfly collectors.

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