In this study to assess the stratal architecture of the surface layer around the Kego fault zone, we collected and studied boring data. Approximately 17,000 boring data was collected, most of which is publicly available. The Kego fault is known for being primarily left-lateral, with one portion in the south-western direction being dip-slip. As such, this study focused on changes in the altitude at which the boring data’s bedrock appeared and investigated the locations at which the fault structure passes along. As a result, changes in the altitude at which the bedrock appeared was notable at Hakata Bay, and this gradually became hilly towards the south. Due to prominent gravel layers, the bedrock appearance altitude was difficult to ascertain, however we were able to confirm the locations at which the fault structure passed through from Hakata Bay to the southern part of Kasuga City.