An ink composition, comprising: a pigment; polymer particles; and a polar solvent with a boiling point of 150°C or higher, the boiling point being the standard boiling point at 1 atm, wherein the polymer particles include a core polymer and a shell polymer that covers at least a portion of the core polymer, a glass transition point of the polymer that configures the core polymer is more than 10°C lower than the glass transition point of the polymer that configures the shell polymer, the glass transition points of the core polymer and the shell polymer being calculated using the FOX formula, the polymer that configures the shell polymer includes a polymer having a (meth)acrylate monomer unit and a carboxylic acid monomer unit, the content (solid content conversion) of the polymer particles is 1.0 mass% to 10 mass% with respect to the total amount of the ink composition, the total content of polar solvent having a boiling point of 150°C or higher in the ink composition, the boiling point being the standard boiling point at 1 atm, is 10 mass% to 25 mass% of the total amount of the ink composition, the total content of polar solvent with a boiling point of 260°C or higher in the ink composition, the boiling point being the standard boiling point at 1 atm, is 5.0 mass% or less with respect to the total amount of the ink composition, the acid value of the polymer that configures the core polymer is 30 mgKOH/g or less, and the acid value of the polymer that configures the shell polymer is 20 to 400 mgKOH/g, the polymer particles include 0.50 mass% to 20 mass% of specified polymer particles with respect to the total amount of the polymer particles, and characterized in that the specified polymer particles have a mass ratio (c/s) of the mass of the core polymer (c) to the mass of the shell polymer (s) of 0.40 to 4.0, and a ratio ((c/s)/φ) of the mass ratio (c/s) to the average particle diameter φ (unit: nm) of the polymer particles of 0.010 or more, wherein the average particle diameter φ is volumetric and is obtained by a dynamic light scattering method. a pigment; polymer particles; and a polar solvent with a boiling point of 150°C or higher, the boiling point being the standard boiling point at 1 atm, wherein the polymer particles include a core polymer and a shell polymer that covers at least a portion of the core polymer, a glass transition point of the polymer that configures the core polymer is more than 10°C lower than the glass transition point of the polymer that configures the shell polymer, the glass transition points of the core polymer and the shell polymer being calculated using the FOX formula, the polymer that configures the shell polymer includes a polymer having a (meth)acrylate monomer unit and a carboxylic acid monomer unit, the content (solid content conversion) of the polymer particles is 1.0 mass% to 10 mass% with respect to the total amount of the ink composition, the total content of polar solvent having a boiling point of 150°C or higher in the ink composition, the boiling point being the standard boiling point at 1 atm, is 10 mass% to 25 mass% of the total amount of the ink composition, the total content of polar solvent with a boiling point of 260°C or higher in the ink composition, the boiling point being the standard boiling point at 1 atm, is 5.0 mass% or less with respect to the total amount of the ink composition, the acid value of the polymer that configures the core polymer is 30 mgKOH/g or less, and the acid value of the polymer that configures the shell polymer is 20 to 400 mgKOH/g, the polymer particles include 0.50 mass% to 20 mass% of specified polymer particles with respect to the total amount of the polymer particles, and characterized in that the specified polymer particles have a mass ratio (c/s) of the mass of the core polymer (c) to the mass of the shell polymer (s) of 0.40 to 4.0, and a ratio ((c/s)/φ) of the mass ratio (c/s) to the average particle diameter φ (unit: nm) of the polymer particles of 0.010 or more, wherein the average particle diameter φ is volumetric and is obtained by a dynamic light scattering method.