Toner

A toner comprising a toner particle comprising

• a toner base particle, and
• an organosilicon polymer partially-coating the toner base particle, wherein,
• when S1 (μm2) is a total area of a non-coated part which is not coated with the organosilicon polymer on an outermost surface of the toner particle,
• S2 (μm2) is a total area of a coated part which is coated with the organosilicon polymer on the outermost surface of the toner particle, and
• SA1 (μm2) is a total of areas of non-coated part domains each of which has an area of not more than 0.10 μm2, in non-coated part domains D1,
• formulae (1) and (2) below are satisfied:
• 0.45≤[S2/(S1+S2)]≤0.65 (1)
• (SA1/S1)≥0.50 (2)
• where, in scanning electron microscope observation of the outermost surface of the toner particle, when a backscattered electron image of the 1.5-μm square on the outermost surface of the toner particle is obtained, brightness of each pixels constituting the backscattered electron image is assigned to one of 256 gradations from brightness 0 to 255, and the brightness is plotted on a horizontal axis and the number of pixels is plotted on a vertical axis to obtain a brightness histogram,
• two local maximum values P1 and P2, and a local minimum value V between the P1 and the P2 occur in the brightness histogram, and brightness yielding the local maximum value P1 is less than brightness yielding the local maximum value P2,
• a peak containing the P2 is a peak derived from the coated part, while
• a peak containing the P1 is a peak derived from the non-coated part, and
• in a binarized image obtained by binarizing the backscattered electron image into a region W derived from the peak containing the P1 and a region B derived from the peak containing the P2, with the local minimum value V being a boundary between the regions,
• the non-coated part domains D1 are domains derived from the non-coated part, while
• coated part domains D2 are domains derived from the coated part, and
• the S1 (μm2) is a total of areas of the non-coated part domains D1, and the S2 (μm2) is a total of areas of the coated part domains D2.