Enables inositol-polyphosphate 5-phosphatase activity. Predicted to be involved in inositol phosphate dephosphorylation; inositol phosphate-mediated signaling; and negative regulation of neuron death. Located in dendrite. Orthologous to human INPP5A (inositol polyphosphate-5-phosphatase A). [provided by Alliance of Genome Resources, Apr 2022]