Mount Miwa
Six tumuli have been found in the Shiki area at the base of Mount Miwa. These earthen mounds were built between 250 AD to 350 AD, and all display the same keyhole shape and stone chambers found in earlier mounds. However, the tumuli found at Mount Miwa hint at the beginning of a more centralized Yamato state. All six mounds are exceptionally large, twice as large as any similar mounds found in Korea, and contain prolific amounts of mirrors, weapons, ornaments, as well as finely built wood and bamboo coffins.