A white light-emitting device, comprising: a mounting substrate having a planar surface; a light-emitting element mounted on the planar surface, the light-emitting element being configured to emit blue excitation light, the light emitting element configured to have a peak wavelength of the blue excitation light shifting in a range of 420 nm to 460 nm due to an increase in temperature of the white light-emitting device; a transparent layer provided on the light-emitting element, the transparent layer sealing the light-emitting element; a phosphor layer covering the transparent layer, the phosphor layer having a semicircular outer peripheral shape in cross section perpendicular to the planar surface; and a first phosphor included in the phosphor layer, the first phosphor excited by the blue excitation light and emitting fluorescence, a peak wavelength of the fluorescence being not shorter than 520 nm and shorter than 660 nm, the peak wavelength of the fluorescence shifting in a same direction when a peak wavelength of the blue excitation light shifts; the first phosphor being a yellow-green/yellow phosphor emitting yellow-green/yellow fluorescence having a maximum peak wavelength not shorter than 520 nm and shorter than 600 nm and being represented by the general equation (Sr 1-x1 Ce x1) a1 AlSi b1 0 c1 N d1, where x1, a1, b1, c1, and d1 satisfy relationships of 0 < x1 < 1, 0.6 < a1 < 0.95, 2.0 < b1 < 3.9, 0 < c1 < 0.45, and 4.0 < d1 < 5.0, respectively; wherein the peak wavelength of the fluorescence of the first phosphor shifts by 20 nm or more, and not more than 50 nm, when the peak wavelength of the blue excitation light shifts from 420 nm to 460 nm and further comprising a second phosphor being a green phosphor emitting green fluorescence having a maximum peak wavelength not shorter than 480 nm and shorter than 550 nm and represented by general expression, where x2, a2, b2, c2, and d2 satisfy relationships of 0 < x2 < 1, 0.93 < a2 < 1.3, 4.0 < b2 < 5.8, 0.6 < c2 < 1.0, and 6.0 < d2 < 11, respectively (Sr 1-x2 Eu x2) a2 AlSi b2 0 c2 N d2 ····· and further comprising a third phosphor being a red phosphor emitting red fluorescence having a maximum peak wavelength not shorter than 600 nm and shorter than 760 nm and represented by general expression, where x3, a3, b3, c3, and d3 satisfy relationships of 0 < x3 < 1, 0.6 < a3 < 0.95, 2.0 < b3 < 3.9, 0.25 < c3 < 0.45, and 4.0 < d3 < 5.0, respectively (Sr 1-x3 Eu x3) a3 AlSi b3 0 c3 N d3. a mounting substrate having a planar surface; a light-emitting element mounted on the planar surface, the light-emitting element being configured to emit blue excitation light, the light emitting element configured to have a peak wavelength of the blue excitation light shifting in a range of 420 nm to 460 nm due to an increase in temperature of the white light-emitting device; a transparent layer provided on the light-emitting element, the transparent layer sealing the light-emitting element; a phosphor layer covering the transparent layer, the phosphor layer having a semicircular outer peripheral shape in cross section perpendicular to the planar surface; and a first phosphor included in the phosphor layer, the first phosphor excited by the blue excitation light and emitting fluorescence, a peak wavelength of the fluorescence being not shorter than 520 nm and shorter than 660 nm, the peak wavelength of the fluorescence shifting in a same direction when a peak wavelength of the blue excitation light shifts; the first phosphor being a yellow-green/yellow phosphor emitting yellow-green/yellow fluorescence having a maximum peak wavelength not shorter than 520 nm and shorter than 600 nm and being represented by the general equation (Sr 1-x1 Ce x1) a1 AlSi b1 0 c1 N d1, where x1, a1, b1, c1, and d1 satisfy relationships of 0 < x1 < 1, 0.6 < a1 < 0.95, 2.0 < b1 < 3.9, 0 < c1 < 0.45, and 4.0 < d1 < 5.0, respectively; wherein the peak wavelength of the fluorescence of the first phosphor shifts by 20 nm or more, and not more than 50 nm, when the peak wavelength of the blue excitation light shifts from 420 nm to 460 nm and further comprising a second phosphor being a green phosphor emitting green fluorescence having a maximum peak wavelength not shorter than 480 nm and shorter than 550 nm and represented by general expression, where x2, a2, b2, c2, and d2 satisfy relationships of 0 < x2 < 1, 0.93 < a2 < 1.3, 4.0 < b2 < 5.8, 0.6 < c2 < 1.0, and 6.0 < d2 < 11, respectively