Electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

An electrostatic charge image developing toner comprising:

• negatively charged toner particles;
• and
• silica particles added to an exterior of the toner particles,
• wherein in a case where the silica particles are sorted into silica particles (S1) having a circularity of 0.91 or more and silica particles (S2) having a circularity less than 0.91,
• a mass ratio N/Si of a nitrogen element to a silicon element in a group of the silica particles (S1) is 0.005 or more and 0.50 or less,
• a mass ratio N/Si of a nitrogen element to a silicon element in a group of the silica particles (S2) is less than 0.005,
• an average circularity of the silica particles (S2) is 0.84 or more and less than 0.91, and
• the silica particles (S1) include silica particles having a coating structure that consists of a reaction product of a trifunctional silane coupling agent and a nitrogen element-containing compound that has adhered to the coating structure.