Wiswillani (Hispanicized spellings Huishuillane, Huishuillani, erroneously also Huishillani) or Q'asa (Quechua for mountain pass,[2] Hispanicized spelling Ccasa) is a mountain in the Andes of Peru, about 5,070.3 metres (16,635 ft) high.

It is situated in the Arequipa Region, Caylloma Province, on the border of the districts Tisco and Callalli.

The mountain lies south of the lake Samaquta.

[3] By the local people Wiswillani is venerated as an apu.

This Peru mountain, mountain range, or peak related article is a stub.