A method for manufacturing a non-aqueous electrolyte secondary cell, comprising: (A) preparing a pre-cell comprising: a cathode comprising a layered lithium-containing transition metal oxide of the following composition formula as a cathode active material Li 1.5 [Ni a Co b Mn c [Li] d ]O 3 ... where a, b, c and d satisfy 0 < a < 1.4, 0 ≤ b < 1.4, 0 < c < 1.4, 0 < d ≤ 0.5, a + b + c + d = 1.5, and 1.0 ≤ a + b + c < 1.5; an anode comprising a carbon-based material as an anode active material; and an electrolytic solution containing an organic solvent, a lithium salt electrolyte and an additive; (B) carrying out an anode aging treatment of applying a voltage between the cathode and anode of the prepared pre-cell, wherein the anode aging treatment is carried out at an applied voltage within a range from 2.0 V to 3.6 V such that charge level of the non-aqueous electrolyte secondary cell is maintained at a predetermined level within the range from 10% to 30% of a full charge for a predetermined time period within the range from 1 hour to 7 days, and wherein the charging rate is within the range from 0.01 C to 0.2 C; and (C) subsequently carrying out a cathode activating treatment that is a charge-discharge cycle treatment of applying a voltage between the cathode and the anode, wherein the cathode activating treatment is carried out by applying a voltage within a potential plateau region of the cathode active material, and wherein the potential plateau region of the cathode active material corresponds to a range from 4.3 to 4.65 V in applied voltage. (A) preparing a pre-cell comprising: a cathode comprising a layered lithium-containing transition metal oxide of the following composition formula as a cathode active material Li 1.5 [Ni a Co b Mn c [Li] d ]O 3 ... where a, b, c and d satisfy 0 < a < 1.4, 0 ≤ b < 1.4, 0 < c < 1.4, 0 < d ≤ 0.5, a + b + c + d = 1.5, and 1.0 ≤ a + b + c < 1.5; an anode comprising a carbon-based material as an anode active material; and an electrolytic solution containing an organic solvent, a lithium salt electrolyte and an additive; where a, b, c and d satisfy 0 < a < 1.4, 0 ≤ b < 1.4, 0 < c < 1.4, 0 < d ≤ 0.5, a + b + c + d = 1.5, and 1.0 ≤ a + b + c < 1.5; an anode comprising a carbon-based material as an anode active material; and an electrolytic solution containing an organic solvent, a lithium salt electrolyte and an additive; (B) carrying out an anode aging treatment of applying a voltage between the cathode and anode of the prepared pre-cell, wherein the anode aging treatment is carried out at an applied voltage within a range from 2.0 V to 3.6 V such that charge level of the non-aqueous electrolyte secondary cell is maintained at a predetermined level within the range from 10% to 30% of a full charge for a predetermined time period within the range from 1 hour to 7 days, and wherein the charging rate is within the range from 0.01 C to 0.2 C; and (C) subsequently carrying out a cathode activating treatment that is a charge-discharge cycle treatment of applying a voltage between the cathode and the anode, wherein the cathode activating treatment is carried out by applying a voltage within a potential plateau region of the cathode active material, and wherein the potential plateau region of the cathode active material corresponds to a range from 4.3 to 4.65 V in applied voltage. <EOS>