A hot-rolled steel sheet comprising, as a chemical composition, by mass%: C: 0.040% to 0.250%; Si: 0.05% to 3.00%; Mn: 0.50% to 4.00%; sol. Al: 0.001% to 2.000%; P: 0.100% or less; S: 0.0300% or less; N: 0.1000% or less; O: 0.0100% or less; Ti: 0% to 0.300%; Nb: 0% to 0.100%; V: 0% to 0.500%; Cu: 0% to 2.00%; Cr: 0% to 2.00%; Mo: 0% to 1.00%; Ni: 0% to 2.00%; B: 0% to 0.0100%; Ca: 0% to 0.0200%; Mg: 0% to 0.0200%; REM: 0% to 0.1000%; Bi: 0% to 0.020%; one or two or more of Zr, Co, Zn, or W: 0% to 1.00% in total; Sn: 0% to 0.050%; and a remainder consisting of Fe and impurities, wherein a metallographic structure contains, by area%, more than 92.0% and 100.0% or less of martensite and tempered martensite in total, less than 3.0% of residual austenite, and less than 5.0% of ferrite, has a ratio S 60 /S 7, which is a ratio of a density S 60 of a length of a grain boundary having a crystal misorientation of 60° to a density S 7 of a length of a grain boundary having a crystal misorientation of 7° about a <110> direction, of more than 0.34 and less than 0.60, has a standard deviation of a Mn concentration of 0.60 mass% or less, and has a tensile strength of 980 MPa or more, and wherein the metallographic structure, the ratio S 60 /S 7, the standard deviation of the Mn concentration, and the tensile strength are measured as defined in the description. C: 0.040% to 0.250%; Si: 0.05% to 3.00%; Mn: 0.50% to 4.00%; sol. Al: 0.001% to 2.000%; P: 0.100% or less; S: 0.0300% or less; N: 0.1000% or less; O: 0.0100% or less; Ti: 0% to 0.300%; Nb: 0% to 0.100%; V: 0% to 0.500%; Cu: 0% to 2.00%; Cr: 0% to 2.00%; Mo: 0% to 1.00%; Ni: 0% to 2.00%; B: 0% to 0.0100%; Ca: 0% to 0.0200%; Mg: 0% to 0.0200%; REM: 0% to 0.1000%; Bi: 0% to 0.020%; one or two or more of Zr, Co, Zn, or W: 0% to 1.00% in total; Sn: 0% to 0.050%; and a remainder consisting of Fe and impurities, wherein a metallographic structure contains, by area%, more than 92.0% and 100.0% or less of martensite and tempered martensite in total, less than 3.0% of residual austenite, and less than 5.0% of ferrite, has a ratio S 60 /S 7, which is a ratio of a density S 60 of a length of a grain boundary having a crystal misorientation of 60° to a density S 7 of a length of a grain boundary having a crystal misorientation of 7° about a <110> direction, of more than 0.34 and less than 0.60, has a standard deviation of a Mn concentration of 0.60 mass% or less, and has a tensile strength of 980 MPa or more, and wherein the metallographic structure, the ratio S 60 /S 7, the standard deviation of the Mn concentration, and the tensile strength are measured as defined in the description. contains, by area%, more than 92.0% and 100.0% or less of martensite and tempered martensite in total, less than 3.0% of residual austenite, and less than 5.0% of ferrite, has a ratio S 60 /S 7, which is a ratio of a density S 60 of a length of a grain boundary having a crystal misorientation of 60° to a density S 7 of a length of a grain boundary having a crystal misorientation of 7° about a <110> direction, of more than 0.34 and less than 0.60, has a standard deviation of a Mn concentration of 0.60 mass% or less, and has a tensile strength of 980 MPa or more, and wherein the metallographic structure, the ratio S 60 /S 7, the standard deviation of the Mn concentration, and the tensile strength are measured as defined in the description.