Conductive substrate for electrophotographic photoreceptor, electrophotographic photoreceptor, process cartridge, image forming apparatus, and method for manufacturing conductive substrate for electrophotographic photoreceptor

A method for manufacturing a conductive substrate for an electrophotographic photoreceptor, the method comprising:

• subjecting an inner circumferential surface of a conductive substrate at both end portions in an axial direction to processing treatment by water jetting to make a sum S of intensity 0.02 or greater and 0.10 or less within a period range of 0.01 mm to 0.1 mm in a power spectrum obtained through fast Fourier transform of a roughness profile in the axial direction of the inner circumferential surface of the conductive substrate at the both end portions in the axial direction.