NOVELTY - Artificial graphite material has ratio of intensity (ID) of the peak which exists in the wavelength of 1360cm-1+/-100cm-1 with respect to the intensity (IG) of the peak which exists in the wavelength of 1580cm-1+/-100cm-1 which is 0.05-0.2. In the electron-spin-resonance method measured using X band, an absorption spectrum derived from carbon appears in 3200-3400 gauss. The ratio of absorption intensity (I280K) of the spectrum measured at 280 K and absorption intensity (I4.8K) at 4.8 K is 5-12.    USE - Artificial graphite material is used for negative electrode for lithium ion secondary battery (all claimed) for motor vehicles, hybrid vehicles, plug-in hybrid motor vehicles, electric vehicles, and electric power storage of system infrastructure.    ADVANTAGE - The artificial graphite material provides negative electrode having excellent reliability, and lithium ion secondary battery having excellent output characteristics, suppresses the capacity degradation and reduces internal resistance of lithium ion secondary battery.    DETAILED DESCRIPTION - Artificial graphite material has microcrystal having size L (112) of c-axis direction computed from (112) diffraction line measured by the powder X-ray diffractometry is 5-25 nm, and in Raman-spectrum analysis using argon-ion-laser light with wavelength of 5145 Angstrom . The ratio of intensity (ID) of the peak which exists in the wavelength of 1360cm-1+/-100cm-1 with respect to the intensity (IG) of the peak which exists in the wavelength of 1580cm-1+/-100cm-1 is 0.05-0.2. In the electron-spin-resonance method measured using X band, an absorption spectrum derived from carbon appears in 3200-3400 gauss. The ratio of absorption intensity (I280K) of the spectrum measured at 280 K and absorption intensity (I4.8K) at 4.8 K is 5-12.An INDEPENDENT CLAIM is included for manufacture of artificial graphite material, which involves coking raw material oil composition containing 50 %mass or more aroma component, 0.5 %mass or less sulfur, light oil having end point of 380 degrees C or less, and heavy oil having initial boiling point of 200 degrees C or more, 0.2 %mass or less nitrogen, and heat-processing obtained product after coking process.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of lithium ion secondary battery.    Battery (10)    Negative electrode (11)    Anode collector (12)    Positive electrode (13)    Positive electrode electrical power collector (14)