There are provided a compound containing a phenolic hydroxyl group which exhibits excellent heat resistance and excellent flame retardancy in terms of a cured product, a phenolic resin including the same, a curable composition and a cured product thereof, and a semiconductor sealing material. The compound containing a phenolic hydroxyl group has a dinaphthofuran skeleton, in which each of the two naphthylene skeletons has a hydroxyl group on an aromatic nucleus thereof.