The is an archaeological site with the ruins of a late Asuka period pottery production site located in what is now the Aoidani neighborhood of the city of Imizu, Toyama Prefecture in the Hokuriku region of Japan. It has been protected as a National Historic Site since 1990. Overview The Kosugimaruyama Site located in the southwestern part of the Imizu Hills, in the western part of the Toyama Plain. It contains at least five kilns, workshops, clay mining ditches and at least 24 pit dwellings which were presumably the residences for workers. It was first excavated in 1982 in conjunction with plans to build an industrial park in the area. The kilns were used to produce Sue ware pottery and both cylindrical and flat roof tiles as evidenced by the large number of shards found in the area. It is estimated to date from the late 7th century. During the Asuka period, roof tiles were used mostly for Buddhist temples and major government buildings. The site is one of the earliest such locations found in the Hokuriku region and shows the influence of the central government from the Yamato region and the influence of Buddhism during the Asuka period. The site also contained an iron workshop which dates to the Nara period. A number of buildings have been reconstructed at the site, along with a reconstruction of several anagama kiln. There is also a museum, the at the site. It is located about 15 minutes by car from Kosugi Station on the Ainokaze Toyama Railway Line. See also List of Historic Sites of Japan (Toyama) References External links Toyama Prefecture official site Toyama Prefecture Tourist Information Imizu city official tourism site Imizu, Toyama Asuka period Archaeological sites in Japan History of Toyama Prefecture Historic Sites of Japan Etchū Province Japanese pottery kiln sites