Toner, method of manufacturing toner and image forming method

A toner comprising a mother toner particle containing a binder resin, a releasing agent, and a coloring agent and an external additive comprising an inorganic particulate, which is mixed with the mother toner particle in a mixing process by a mixer, wherein the external additive is isolated from the mother toner particle by ultrasonic vibration and collected, in an aqueous solution comprising a polyoxyethylene lauryl ether compound serving as a surface active agent, in an amount of from 0.1 ppm to 10 ppm/(toner 4 g/100 ml) as measured by atomic absorption spectrometry.