This report presents the strong-motion earthquake records of the 1978 Miyagi-Ken-Oki earthquake in port areas in Japan. Event data of the earthquake are listed with the maximum component accelerations of all the records obtained in the network of the Port and Harbour Research Institute. 14 records of them are presented as acceleration time histories, integrated velocities and displacements, reponse spectra, and Fourier spectra. Listing of the digitized records are presented for five records. This report has almost the same format and almost the same procedures for data processing as the preceding annual report.