Aqu Q'asa (Quechua aqu sand, q'asa mountain pass, "sand pass", Hispanicized spelling Ajojasa) is a mountain in the Wansu mountain range in the Andes of Peru. It is situated in the ApurÃÂmac Region, Antabamba Province, Oropesa District. Aqu Q'asa lies northeast of Hatun Qillqa.