Core-shell particle, and toner

A core-shell particle comprising:

• a core, and
• a shell on a surface of the core, wherein:
• the core comprises a crystalline release agent;
• a value of a sum of a number-average value of Feret diameter of the core-shell particle and a standard deviation of the Feret diameter of the core-shell particle is 20 to 500 nm;
• the shell comprises an organosilicon polymer;
• the organosilicon polymer comprises a structure given by a following formula (RT3)
• R—SiO3/2 (RT3)
• wherein R in formula (RT3) represents an alkyl group having 1 to 6 carbons;
• and
• in a differential scanning calorimetric measurement of the core-shell particle, a maximum endothermic peak is present when a temperature is raised from 30° C. to 120° C. at 10.0° C./min, a maximum exothermic peak is present when the temperature is lowered from 120° C. to 30° C. at 10.0° C./min, Tm (° C.)-Tc (° C.) is 8 to 12° C., and Tm is not greater than 100° C. where Tm is a peak temperature of the maximum endothermic peak and Tc is a peak temperature of the maximum exothermic peak.