Enables phosphatidylinositol phosphate phosphatase activity. Acts upstream of or within with a positive effect on flagellated sperm motility. Located in several cellular components, including neuronal cell body; nucleus; and plasma membrane bounded cell projection. Expressed in PVDL and PVDR. Human ortholog(s) of this gene implicated in congenital muscular dystrophy with cataracts and intellectual disability. Is an ortholog of human INPP5J (inositol polyphosphate-5-phosphatase J) and INPP5K (inositol polyphosphate-5-phosphatase K).