A Paleolithic culture from around 30,000 BC constitutes the first known habitation of the islands of Japan. This was followed from around 14,500 BC (the start of the Jōmon period) by a Mesolithic to Neolithic semi-sedentary hunter-gatherer culture characterized by pit dwelling and rudimentary agriculture. Clay vessels from the period are among the oldest surviving examples of pottery. From around 1000 BC, Yayoi people began to enter the archipelago from Kyushu, intermingling with the Jōmon; the Yayoi period saw the introduction of practices including wet-rice farming, a new style of pottery, and metallurgy from China and Korea. According to legend, Emperor Jimmu (grandson of Amaterasu) founded a kingdom in central Japan in 660 BC, beginning a continuous imperial line.