This
hot rolled steel contains, in terms of
mass %, C: 0.01 to 0.1%, Si: 0.01 to 0.1%, Mn: 0.1 to 3%, P: not more than 0.1%, S: not more than 0.03%, Al: 0.001 to 1%, N: not more than 0.01%, Nb: 0.005 to 0.08%, and Ti: 0.001 to 0.2%, with a remainder being iron and unavoidable impurities, wherein a formula: [Nb]×[C]≦4.34×10−3 is satisfied, a
grain boundary density of
solid solution C is not less than 1 atom / nm2 and not more than 4.5 atoms / nm2, and a grain size of
cementite grains precipitated at grain boundaries within the steel sheet is not more than 1 um. This method for manufacturing a
hot rolled steel sheet includes: heating a steel slab having the same composition as the above
hot rolled steel sheet at a temperature that is not less than a temperature of SRTmin (° C.) and not more than 1,170° C.; performing rough rolling at a finishing temperature of not less than 1,080° C. and not more than 1,150° C.; subsequently starting finish rolling within not less than 30 seconds and not more than 150 seconds at a temperature of not less than 1,000° C. but less than 1,080° C.; completing the finish rolling within a temperature range from not less than an Ar3 transformation point temperature to not more than 950° C. so as to achieve a final pass
reduction ratio of not less than 3% and not more than 15%; and conducting cooling at a
cooling rate exceeding 15° C. / sec from a cooling start temperature to a temperature within a range from not less than 450° C. to not more than 550° C., and then coiling the steel sheet.