An electrostatic charge image developing toner contains toner particles that contain a binder resin, in which in a case where G′1 (90) represents a storage modulus G′ of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 90° C. and a strain of 1%, G′50 (90) represents a storage modulus G′ of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 90° C. and a strain of 50%, and G′50 (180) represents a storage modulus G′ of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 180° C. and a strain of 50%, the electrostatic charge image developing toner satisfies the following Formulas (1) to (4).

G′1(90)<1×10.sup.5  Formula (1)

1×10.sup.3<G′50(180)  Formula (2)

1<G′50(90)/G′50(180)<30  Formula (3)

1<G′1(90)/G′50(90)<10  Formula (4)

A toner for developing an electrostatic charge image includes toner particles having an average circularity Cc of 0.80 or more and less than 0.98, and an external additive containing monodisperse silica particles and titanate compound particles, in which a ratio Rt/Rs of an average primary particle diameter Rt of the titanate compound particles to an average primary particle diameter Rs of the monodisperse silica particles is 0.50 or more and 3.50 or less, and a ratio A/B of an external additive coverage A (%) of the monodisperse silica particles on surfaces of the toner particles to an external additive coverage B (%) of the titanate compound particles on the surfaces of the toner particles satisfies formula (1): 0<A/B≤2.00.

An electrostatic charge image developing toner includes a toner particle containing a binder resin, a release agent, a divalent metal, and a trivalent metal, in which the release agent has a domain diameter of 0.5 μm or greater and 1.5 μm 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 image developing toner includes toner particles containing a binder resin and a release agent. In sections of the toner particles in which the sections of the toner particles have an area St in total and, among sections of domains of the release agent, sections of domains having long diameters of 10 nm or more and 500 nm or less have a total area Sa and sections of domains having long diameters of 1500 nm or more and 3000 nm or less have a total area Sb, an area fraction Sa/St is 2% or more and an area fraction Sb/St is 20% or more.

A toner for developing an electrostatic charge image incorporates toner particles that contain binder resins including an amorphous polyester resin and a crystalline polyester resin, an ester-based release agent, and a polycondensate of a styrene-acrylic resin and a polyolefin resin. The polycondensate of styrene-acrylic and polyolefin resins has a storage modulus G′.sub.SP (70) at 70° C. of 1×10.sup.4 Pa or more and 1×10.sup.7 Pa or less and a storage modulus G′.sub.SP (90) at 90° C. of 1×10.sup.3 Pa or more and 1×10.sup.6 Pa or less in dynamic rheometry. The toner particles have a storage modulus G′.sub.T (70) at 70° C. of 1×10.sup.4 Pa or more and 1×10.sup.6 Pa or less and a storage modulus G′.sub.T (90) at 90° C. of 1×10.sup.3 Pa or more and 1×10.sup.5 Pa or less in dynamic rheometry.

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

An electrostatic charge image developing toner that has a binder resin that contains a crystalline resin and toner particles that contain resin particles, in which a loss coefficient tan δS (30) at 30° C. of the resin particles is 1 or more, and a loss coefficient tan δS (50) at 50° C. of the resin particles is less than 1.