In the crystal structure of the title compound, C32H30N2, all of the four six-membered rings that constitute the diazaadamantanone cage adopt chair conformations. Two of the four phenyl substituents occupy axial, and the other two occupy equatorial positions relative to their respective C5N rings of the adamantane framework. There are no hydrogen-bonded interactions between the two molecules in the unit cell. The crystal packing is characterized by weak C-H···pπ interactions. 2008 © The Japan Society for Analytical Chemistry.