Organic matter, such as wooden ware and fiber, deteriorates easily in soil, so the excavated relics of this period are mainly occupied with clay artifacts, stone objects, and bone and antler objects.
木製品、繊維などの有機物は土中で遺存しにくいため、この時代の出土遺物は土製品、石製品、骨角製品が中心となる。