Aqueous pigment dispersion and water-based ink for inkjet recording

A water-based ink for ink-jet recording, which is excellent in both color developability on plain paper and image sharpness on special paper, and an aqueous pigment dispersion for preparing the same. In an aqueous pigment dispersion for preparing an aqueous ink for ink jet recording, comprising carbon black or an organic pigment, a polymer, a basic substance, and water as essential components, the polymer includes: A copolymer obtained by polymerizing (meth) acrylic acid and other copolymerizable monoethylenically unsaturated monomers as essential components; a phosphoric acid group-containing monoethylenically unsaturated monomer and other copolymers An aqueous pigment dispersion for preparing an aqueous ink for ink-jet recording, comprising a possible monoethylenically unsaturated monomer and a copolymer obtained by polymerization as an essential component, and the aqueous pigment dispersion A water-based ink for inkjet recording, comprising: [Selection figure] None