A toner for developing an electrostatic charge image contains toner particles having an average circularity Cc of 0.98 or more; and external additives including monodisperse silica particles having an average diameter of primary particles of 20 nm or more and 70 nm or less and titanate particles having an average diameter of primary particles of 20 nm or more and 70 nm or less, wherein the absolute difference between the average diameter of primary particles of the monodisperse silica particles and the average diameter of primary particles of the titanate particles is 25 nm or less.

An electrostatic charge image developing toner contains toner particles and silica particles that are added to an exterior of the toner particles and contain a nitrogen element-containing compound containing a molybdenum element, in which in the silica particles, a ratio (Mo/Si) of Net intensity of the molybdenum element to Net intensity of a silicon element measured by X-ray fluorescence analysis is 0.035 or more and 0.35 or less.

A pressure sensitive toner includes toner particles containing a composite resin that includes a styrene-based resin and a (meth)acrylate-based resin. The difference between a lowest glass transition temperature of the composite resin and a highest glass transition temperature thereof is 30° C. or more, and the toner particles have a gel fraction of from 1.0% by mass to 8.0% by mass inclusive.

A toner for electrostatic charge image development has toner particles containing a binder resin including 90 mass % or more of an amorphous resin. In a differential molecular weight distribution curve of tetrahydrofuran soluble matter as measured by gel permeation chromatography, the toner has a maximum peak Ma in a molecular weight range of 2,500 or more and 8,000 or less, a minimum value Mm in a molecular weight range of more than 8,000 and less than 280,000, and a maximum peak Mb in a molecular weight range of 280,000 or more and 900,000 or less. When the area of the differential molecular weight distribution curve in a range of a molecular weight of 100 or more and less than the minimum value Mm is defined as A, and the area of the differential molecular weight distribution curve in a range of the minimum value Mm or more and a molecular weight of 10,000,000 or less is defined as B, the area ratio A/B is 5.5 or more and 10 or less.

An electrostatic charge image developing toner includes a toner particle that contains a pyrazolotriazole-based dye and a zirconium oxide particle.

A toner including particles containing a binder resin, a colorant, and wax, the toner having, in differential scanning calorimetry (DSC) performing a temperature program including steps of heating from 40° C. to 100° C. or more at a heating rate of 10° C./min (first heating), then cooling to 40° C. or less at a cooling rate of 10° C./min (first cooling), and then heating to 100° C. or more at a heating rate of 10° C./min (second heating), a total endothermic amount HA1 in the first heating from 40° C. to 100° C. and a total endothermic amount HA2 in the second heating from 40° C. to 100° C. that satisfy the following relationship (1), and a difference between a full width at half maximum of an endothermic peak in the second heating and a full width at half maximum of an exothermic peak in the first cooling of 7.00° C. or less: (1) HA2/HA1>0.80.

A fine particle of a silicon polymer, wherein the fine particle has pores; the total pore volume of the fine particle is 0.35 to 1.00 cm.sup.3/g; a number-average primary particle diameter of the fine particle is 0.05 to 0.30 μm; the silicon polymer has a siloxane bond and an Si—R.sup.1 bond; R.sup.1 represents an alkyl group having 1 to 6 carbon atoms; and designating, with reference to a chart obtained by .sup.29Si-NMR measurement of the fine particle, A as a total peak area corresponding to the silicon polymer, and B as a peak area corresponding to Si—R.sup.1, A and B satisfy a following formula (1):

10.0≤B/A×100≤45.0   (1).

A white toner includes a toner particle that contains a binder resin containing a hybrid resin in which an amorphous resin unit and a crystalline polyester resin unit are chemically bonded to each other, surface-treated titanium oxide, and a release agent, in which a proportion of Al atoms in a surface of the surface-treated titanium oxide is 3 atomic % or greater and 20 atomic % or less, and a proportion of Ti atoms in the surface is 5 atomic % or greater and 15 atomic % or less.

A photoluminescent toner includes a photoluminescent toner particle that contains a binder resin, a release agent, and a photoluminescent pigment and has a release agent domain, and a silicone oil-treated silica particle that is externally added to the photoluminescent toner particle, in which in observation of a cross section of the photoluminescent toner particle, an average major axis length Dw of the release agent domain and an average major axis length Dp of the photoluminescent pigment satisfy Expression (1).

0.3≤Dw/Dp≤1.0  Expression (1):

A toner comprising a toner particle, wherein the toner particle includes a toner base particle containing a binder resin and includes a protruded portion on a surface of the toner base particle; the protruded portion comprises an organosilicon polymer and a polyhydric acid metal salt; and the polyhydric acid metal salt is present on a surface of the protruded portion.