A cathode material for a lithium-ion secondary battery, comprising: central particles represented by Li x A y M z PO 4 where 0≤x≤1.1, 0.8≤y≤1.1, and 0≤z≤0.2 and A represents at least one element selected from the group consisting of Fe, Mn, Co, and Ni, and M represents at least one element selected from the group consisting of Mg, Ca, Co, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, and rare earth elements; and a carbonaceous film that coats surfaces of the central particles, characterized in that an average value of R values of the cathode material, R being defined by I 1580 /I 1360 which are ratios of a peak intensity I 1580 of a spectrum at a frequency band of 1,580±50 cm -1 to a peak intensity I 1360 of the spectrum at a frequency band of 1,360±50 cm -1 in a Raman spectrum analysis, measured at five points is 0.83 or more and 0.97 or less, and a standard deviation of the R values measured at five points is 0.010 or less wherein an average primary particle diameter is 50 nm or more and 300 nm or less, wherein an amount of carbon in the carbonaceous film is 0.6 parts by mass or more and 3 parts by mass or less with respect to 100 parts by mass of the central particles, wherein D1-D2 is 0.45V or less in the case where a depth of discharge of a discharge capacity of a lithium-ion secondary battery having a cathode including the cathode material and an anode including natural graphite is considered as 100% when the lithium-ion secondary battery is, in an environment of 25°C, constant-current-charged at a current value of 0.1 C until a battery voltage reaches 3.7 V and is then constant-current-discharged at a current value of 5 C until the battery voltage reaches 2.5 V, the battery voltage of the lithium-ion secondary battery which is constant-current-charged at the current value of 0.1 C until the battery voltage reaches 3.7 V and is then constant-current-discharged at a current value of 0.1 C until the depth of discharge reaches 90% is indicated by D1, and the battery voltage of the lithium-ion secondary battery which is constant-current-charged at the current value of 0.1 C until the battery voltage reaches 3.7 V and is then constant-current-discharged at a current value of 5 C until the depth of discharge reaches 90% is indicated by D2; wherein the Raman spectroscopic measurement conditions are the following: Exposure time: 50 seconds Cumulated number: 10 times Central wavelength: 1,300 cm -1 Slit: 0.01 mm×6 mm Objective lens magnification: 100 times Reducer: Optical density 3. central particles represented by Li x A y M z PO 4 where 0≤x≤1.1, 0.8≤y≤1.1, and 0≤z≤0.2 and A represents at least one element selected from the group consisting of Fe, Mn, Co, and Ni, and M represents at least one element selected from the group consisting of Mg, Ca, Co, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, and rare earth elements; and a carbonaceous film that coats surfaces of the central particles, characterized in that an average value of R values of the cathode material, R being defined by I 1580 /I 1360 which are ratios of a peak intensity I 1580 of a spectrum at a frequency band of 1,580±50 cm -1 to a peak intensity I 1360 of the spectrum at a frequency band of 1,360±50 cm -1 in a Raman spectrum analysis, measured at five points is 0.83 or more and 0.97 or less, and a standard deviation of the R values measured at five points is 0.010 or less wherein an average primary particle diameter is 50 nm or more and 300 nm or less, wherein an amount of carbon in the carbonaceous film is 0.6 parts by mass or more and 3 parts by mass or less with respect to 100 parts by mass of the central particles, wherein D1-D2 is 0.45V or less in the case where a depth of discharge of a discharge capacity of a lithium-ion secondary battery having a cathode including the cathode material and an anode including natural graphite is considered as 100% when the lithium-ion secondary battery is, in an environment of 25°C, constant-current-charged at a current value of 0.1 C until a battery voltage reaches 3.7 V and is then constant-current-discharged at a current value of 5 C until the battery voltage reaches 2.5 V, the battery voltage of the lithium-ion secondary battery which is constant-current-charged at the current value of 0.1 C until the battery voltage reaches 3.7 V and is then constant-current-discharged at a current value of 0.1 C until the depth of discharge reaches 90% is indicated by D1, and the battery voltage of the lithium-ion secondary battery which is constant-current-charged at the current value of 0.1 C until the battery voltage reaches 3.7 V and is then constant-current-discharged at a current value of 5 C until the depth of discharge reaches 90% is indicated by D2; wherein the Raman spectroscopic measurement conditions are the following: Exposure time: 50 seconds Cumulated number: 10 times Central wavelength: 1,300 cm -1 Slit: 0.01 mm×6 mm Objective lens magnification: 100 times Reducer: Optical density 3. Exposure time: 50 seconds Cumulated number: 10 times Central wavelength: 1,300 cm -1 Slit: 0.01 mm×6 mm Objective lens magnification: 100 times Reducer: Optical density 3.