In Japan there are the twenty-five sacred sites where the twenty-five historical holy scenes of St. Honen's activities are imitated. From the end of the Edo period until the present, the twenty-five sacred sites were three times reconstructed in the Mikawa district. The areas where these sacred sites exist tend to expand with the passing of time. However, in districts where several of the sites exist next to each other, they tend to decrease. The expansion of the sacred sites at Mikawa, therefore, as compared with the nationwide situation, is a particular case.