Provided is a novel method for manufacturing a composition that contains a poorly water-soluble aromatic compound, the composition having outstanding poorly water-soluble aromatic compound solubility. The method for manufacturing a composition that includes a poorly water-soluble aromatic compound includes: a step (1) for obtaining a poorly water-soluble aromatic compound solution 1, which includes a step (1-1) in which a heat treatment raw material that contains (A) a poorly water-soluble aromatic compound, (B) a polyol, and (C) an aqueous medium is prepared, and a step (1-2) in which the heat treatment raw material is heat-treated under normal pressure at a temperature below 100°C to obtain a heat-treated liquid that contains the poorly water-soluble aromatic compound； and a step (2) in which a poorly water-soluble aromatic compound solution 2, in which (A) the poorly water-soluble aromatic compound is present at the concentration exceeding the saturated solubility at 25°C, is obtained by adding water to the poorly water-soluble aromatic compound solution 1. In step (1), the content of a surfactant in the heat treatment raw material is 0.1% by mass or less, and the content of (A) the poorly water-soluble aromatic compound in the heat treatment raw material is below the saturation solubility of (A) the poorly water-soluble aromatic compound in a solvent with the same composition at 25°C.L'invention concerne un nouveau procédé de fabrication d'une composition qui contient un composé aromatique peu soluble dans l'eau, la composition ayant une solubilité remarquable du composé aromatique peu soluble dans l'eau. Le procédé de fabrication d'une composition qui comprend un composé aromatique peu soluble dans l'eau comprend : une étape (1) pour obtenir une solution de composé aromatique peu soluble dans l'eau 1, qui comprend une étape (1-1) dans laquelle une matière première de traitement thermique qui contient (A) un composé aromatique peu soluble dans l'eau, (B) un poly
