Yokodaidō Steel Production Site - Credit: Wikimedia Commons
The is an archaeological site in the city of Minamisōma, Fukushima Prefecture, in the southern Tōhoku region of northern Japan containing the ruins of a large-scale a late-Nara period to early Heian period bloomery (ironworks). The site was designated a National Historic Site of Japan in 2011 by the Japanese government. Read more on Wikipedia
Source: en.wikipedia.org