This report presents the strong-motion earthquake records of the 1978 Izu-Oshima-Kinkai earthquake and five major aftershocks recorded in port areas in Japan. In the report the event data of the earthquakes and the maximum component accelerations of all the records are listed. For seven records of the main shock and three records of the largest aftershock, acceleration time histories, integrated velocities and displacements, response spectra, Fourier spectra, and listing of the digitized records are presented. The format and procedures for data processing of the report are almost identical with those of the preceding annual report.