However there is a difference in the shape of hole-shaped graves in the Jomon and Yayoi periods (especially in western Japan), and hole-shaped graves in the Yayoi period was longer in length.
しかし、縄文時代の土壙墓と弥生時代の（特に西日本の）土壙墓とはその形状に差があり、後者の方が全長が長い。