An aqueous lithium ion secondary battery, comprising: a negative electrode current collector (10, 10a, 10b, 10c) for an aqueous lithium ion secondary battery, comprising a surface in contact with an aqueous electrolyte solution, the surface including a material containing at least one selected from the group consisting of Mg and Zr as a main component; wherein the main component refers to a component whose proportion is 50 mol% or more with respect to the entire material of the surface of the negative electrode current collector (10, 10a, 10b, 10c); a negative electrode active material layer that includes a negative electrode active material and is in contact with the negative electrode current collector (10, 10a, 10b, 10c); wherein the negative electrode active material contains lithium titanate; a positive electrode current collector; a positive electrode active material layer that includes a positive electrode active material and is in contact with the positive electrode current collector; and an aqueous electrolyte solution containing water and an electrolyte, wherein the negative electrode current collector (10, 10a, 10b, 10c) is in contact with the aqueous electrolyte solution; and wherein the electrolyte contains lithium bis(trifluoromethanesulfonyl)imide, and the aqueous electrolyte solution contains the lithium bis(trifluoromethanesulfonyl)imide such that an amount of substance of the lithium bis(trifluoromethanesulfonyl)imide is within a range of 7.5 mol to 12.5 mol per kg of the water. a negative electrode current collector (10, 10a, 10b, 10c) for an aqueous lithium ion secondary battery, comprising a surface in contact with an aqueous electrolyte solution, the surface including a material containing at least one selected from the group consisting of Mg and Zr as a main component; wherein the main component refers to a component whose proportion is 50 mol% or more with respect to the entire material of the surface of the negative electrode current collector (10, 10a, 10b, 10c); wherein the main component refers to a component whose proportion is 50 mol% or more with respect to the entire material of the surface of the negative electrode current collector (10, 10a, 10b, 10c); a negative electrode active material layer that includes a negative electrode active material and is in contact with the negative electrode current collector (10, 10a, 10b, 10c); wherein the negative electrode active material contains lithium titanate; a positive electrode current collector; a positive electrode active material layer that includes a positive electrode active material and is in contact with the positive electrode current collector; and an aqueous electrolyte solution containing water and an electrolyte, wherein the negative electrode current collector (10, 10a, 10b, 10c) is in contact with the aqueous electrolyte solution; and wherein the electrolyte contains lithium bis(trifluoromethanesulfonyl)imide, and the aqueous electrolyte solution contains the lithium bis(trifluoromethanesulfonyl)imide such that an amount of substance of the lithium bis(trifluoromethanesulfonyl)imide is within a range of 7.5 mol to 12.5 mol per kg of the water. wherein the negative electrode current collector (10, 10a, 10b, 10c) is in contact with the aqueous electrolyte solution; and wherein the electrolyte contains lithium bis(trifluoromethanesulfonyl)imide, and the aqueous electrolyte solution contains the lithium bis(trifluoromethanesulfonyl)imide such that an amount of substance of the lithium bis(trifluoromethanesulfonyl)imide is within a range of 7.5 mol to 12.5 mol per kg of the water.