An electrostatic charge image developing toner includes a toner particle which has a sea portion containing a binder resin and an island portion containing a release agent, wherein a melt viscosity at 100° C. of the toner is from 4,000 to 200,000 Pa·s, a flow activation energy of the toner is 18,000 to 80,000 J·mol−1, a maximum frequent value in distribution of eccentricity B of the island portion is from 0.75 to 0.98, a skewness in the distribution of the eccentricity B is from −1.10 to −0.50, and the eccentricity B is expressed by 2d/D, wherein D indicates an equivalent circle diameter (μm) of the toner in an observation of a cross-section of the toner, and d indicates a distance (μm) from a centroid of the toner to a centroid of the island portion containing the release agent in the observation of a cross-section of the toner.