NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, METHOD OF MANUFACTURING NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL SLURRY FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

A negative electrode material for a lithium ion secondary battery, including composite particles, each of the composite particles including: a spherical graphite particle; and flat graphite particles that are gathered or bound together such that the flat graphite particles have non-parallel orientation planes, wherein the composite particles satisfy the following (1) and (2): (1) a pore volume in a range of a pore diameter of from 0.10 to 8.00 μm obtained by the mercury intrusion method is from 0.20 to 1.00 mL/g; and (2) in a log differential pore volume distribution obtained by the mercury intrusion method, at least two peaks appear in a range of a pore diameter of from 0.10 to 8.00 the two peaks including a first peak P1 and a second peak P2 at a higher diameter than the first peak P1.