The Wai Apu people are an ethnic group that are the indigenous inhabitants of Buru Island in the province of Maluku, Indonesia. The name of this ethnic group is taken from its distribution area, namely around the Waeapo River, usually inhabiting the northeastern region of the island which is now known as the districts of Namlea and . Research from the Indonesian Ministry of Social Affairs in 1971 numbers the Wai Apu population at approximately 3,691.
The creator Opolastala formed Mount Date and Lake Rana, together a region termed Bumilale, as the source of life for humanity. Accordingly Bumilale occupies a central position within the Wai Apu belief system, conceptualised as a paradise surpassing all other regions in its beauty, one which must be protected from outside harm to preserve its harmony.
In the Wai Apu cosmology, Buru Island (Bupolo) is likened metaphorically to a human, with the various geographic features representing anatomical features:
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