Catalyzes the stereospecific hydrolysis of the cyclic amide bond of D-hydantoin derivatives with an aromatic side chains at the 5'-position. Has no activity on dihydropyrimidines. The physiological function is unknown. D-5-phenylhydantoin + H2O = H(+) + N-carbamoyl-D-phenylglycine Binds 2 divalent metal cations per subunit. Homotetramer. Carboxylation allows a single lysine to coordinate two divalent metal cations. Belongs to the metallo-dependent hydrolases superfamily. Hydantoinase/dihydropyrimidinase family.