Provided is a semicarbazide composition comprising: a semicarbazide compound (A) having an amino group and a semicarbazide group; a semicarbazide compound (B-1) having a structure with a semicarbazide group substituted for the amino group of the semicarbazide compound (A); a semicarbazide compound (B-2) as a dimer of the semicarbazide compound (B-1); and a semicarbazide compound (B-3) as a trimer of the semicarbazide compound (B-1); the semicarbazide composition having an analysis area ratio (a) of 0.008% or more and 2% or less.