Discarded road measuring 4.5m in width with more than nine pairs of ruts in-between. Along the southern side of the road, a large number of duplicated receptacles for manure, made of mortar, looks jammed to make a line. This road was the former Shirakawa-michi route running to the northeast for crossing the Hiei mountains. The hardened surface of the road of the medieval age running to the same direction has been found close to here, which clearly shows the long duration of this route.

Mining pits for clay. Such pits of the Medieval took an irregular shape while they began to take basically the shape of a quadrangle from Middle Edo Period. This area is adjacent to the Okazaki area, whose deposited fine clay was purchased for producing one of the Kyo-Yaki glazed stoneware types, namely Awata-Yaki, and was labelled as the Okazaki-tsuchi. The clay from these very pits might have been treated as the Okazaki-tsuchi.

Fossa at the southern side of the garrison of the fief of Tosa, 2.9m in width and 0.9-1.1m in depth. A sandy layer of the bottom denied this fossa to keep water. A dump of roof-tiles were found from the fill, with quite a few pieces having stamps of various kinds by tile makers in the fief of Tosa, 300km apart to the west of Kyoto.

This curious structure was constructed in the fill of the ditch which had enclosed the area for the Awa domain (now known as Tokushima prefecture). The remaining width and height measure 5.6m and 0.5m, respectively. While the main constituents are normal tiles without decoration, some levels of the front side are composed of various kinds of terminal roof-tiles to make a good appearance. These tiles must have been originally roofed on several building structures here and somewhere else. They include the terminal tile with a family crest of the feudal of the Awa domain, "卍", though none of other tiles can be an indicator of that domain.