Abstract
Port authorities have been making their own port business continuity plan particularly since the Great East Japan Earthquake happened. This study firstly focused upon the so-called time line in the BCP of Mikawa Port and that of Kinuura Port, which had been made by Aichi Prefecture, and pointed out the issues in making the time line of port BCP. It secondly clarified the matters to be considered to improve, by analyzing the changes in time line due to the variation of suppositions. Finally, it turned out that the plan should emphasize the critical facilities considering the functions to be recovered earlier in order to continue the industries of its hinterlands. It moreover suggested that appropriate preservation of the equipment and other resources apparently affects the workability though the timeline does not have to be changed in itself for any scenarios.