Cold rolling method and method for producing cold-rolled steel sheet

A cold rolling method comprising:

• rolling a steel sheet in multiple passes using a cold mill;
• in a specific rolling pass in which the target sheet thickness to on an exit side of the rolling pass is less than or equal to a reference sheet thickness, determining whether or not the steel sheet unit tension N1 during steady-state rolling exceeds the reference unit tension N0 calculated by the following formula (1), and
• controlling the steel sheet unit tension N2 in an initial stage of rolling a front end in an area extending at least 50 m from a leading end in the rolling direction of the steel sheet on an entry side of the specific rolling pass to be less than the reference unit tension No and less than the steel sheet unit tension N1 during the steady-state rolling, in a case where the steel sheet unit tension N1 during steady-state rolling exceeds the reference unit tension N0
• N0=(150/9)t0+27.1 (1).