A silicon-compound-coated iron oxide particle in which at least part of a surface of the iron oxide particle is coated with a silicon compound, wherein the silicon-compound-coated iron oxide particle whose M-OH bond ratio included in the silicon-compound-coated iron oxide particle is controlled is a silicon-compound-coated iron oxide particle in which at least part of a surface of a single iron oxide particle or of a surface of an agglomerate formed by agglomeration of plural iron oxide particles is coated with a silicon compound, a particle diameter of the silicon-compound-coated iron oxide particle or the agglomerate of the iron oxide particles is 1 nm or more and 50 nm or less, and a combination of a M-OH bond/M-O bond ratio of the silicon-compound-coated iron oxide particle, and a color characteristic of the silicon-compound-coated iron oxide particle is any one of the following a1 to a8: M-OH bond/M-O bond ratio of the silicon-compound-coated iron oxide particle Color characteristic of the silicon-compound-coated iron oxide particle a1 1% or more and 30% or less An average reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 780 nm to 2500 nm is 50% or more a2 14% or more and 35% or less A maximum reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 400 nm to 620 nm is 18% or less a3 10% or more and 28% or less An average reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 620 nm to 750 nm is 22% or less a4 2% or more and 25% or less A hue H (=b*/a*) in an L*a*b* color system is in a range of 0.5 to 0.9 a5 1% or more and 31% or less A transmittance to a light beam at wavelength of 380 nm in a transmission spectrum of a dispersion solution in which the silicon-compound-coated iron oxide particle is dispersed in a dispersion medium is 5% or less, and a transmittance thereof to a light beam at wavelength of 600 nm is 80% or more a6 5% or more and 35% or less An average molar absorption coefficient to a light beam in the wavelength of 190 nm to 380 nm in a dispersion solution in which the silicon-compound-coated iron oxide particle is dispersed in a dispersion medium is 2200 L/ (mol·cm) or more a7 5% or more and 30% or less. Note that the silicon-compound-coated iron oxide particle includes an ester bond. An average reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 780 nm to 2500 nm is 50% or more a8 1% or more and less than 10%, or more than 28% and 35% or less An average reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 620 nm to 750 nm is more than 22% the silicon-compound-coated iron oxide particle whose M-OH bond ratio included in the silicon-compound-coated iron oxide particle is controlled is a silicon-compound-coated iron oxide particle in which at least part of a surface of a single iron oxide particle or of a surface of an agglomerate formed by agglomeration of plural iron oxide particles is coated with a silicon compound, a particle diameter of the silicon-compound-coated iron oxide particle or the agglomerate of the iron oxide particles is 1 nm or more and 50 nm or less, and a combination of a M-OH bond/M-O bond ratio of the silicon-compound-coated iron oxide particle, and a color characteristic of the silicon-compound-coated iron oxide particle is any one of the following a1 to a8: M-OH bond/M-O bond ratio of the silicon-compound-coated iron oxide particle Color characteristic of the silicon-compound-coated iron oxide particle a1 1% or more and 30% or less An average reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 780 nm to 2500 nm is 50% or more a2 14% or more and 35% or less A maximum reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 400 nm to 620 nm is 18% or less a3 10% or more and 28% or less An average reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 620 nm to 750 nm is 22% or less a4 2% or more and 25% or less A hue H (=b*/a*) in an L*a*b* color system is in a range of 0.5 to 0.9 a5 1% or more and 31% or less A transmittance to a light beam at wavelength of 380 nm in a transmission spectrum of a dispersion solution in which the silicon-compound-coated iron oxide particle is dispersed in a dispersion medium is 5% or less, and a transmittance thereof to a light beam at wavelength of 600 nm is 80% or more a6 5% or more and 35% or less An average molar absorption coefficient to a light beam in the wavelength of 190 nm to 380 nm in a dispersion solution in which the silicon-compound-coated iron oxide particle is dispersed in a dispersion medium is 2200 L/ (mol·cm) or more a7 5% or more and 30% or less. Note that the silicon-compound-coated iron oxide particle includes an ester bond. An average reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 780 nm to 2500 nm is 50% or more a8 1% or more and less than 10%, or more than 28% and 35% or less An average reflectance of the silicon-compound-coated iron oxide particle to a light beam in the wavelength of 620 nm to 750 nm is more than 22%