Presently, the borui has been weathered, and much of it has been buried in the ground, because the coastline has extended more offshore than in the Kamakura period due to land filling, etc.
現在は、埋め立てなどにより鎌倉時代当時よりも海岸線が沖へ延びているため風化し、土中に埋没している部分が多い。