Recently, a lot of mokkan (narrow strip of wood on which an official message is written) that describe the large remains of structures, or delivery of taxes, were unearthed in the palace town ruins located 1 km to the north from the palace ruins of Shigaraki no miya (ruins designated by the nation), therefore, it was considered as a probable place of the palace ruins.
最近では国史跡・紫香楽宮跡の北約1kmに位置する宮町遺跡から大規模な建物跡や税納入を示す木簡が大量に出土したことから、ここが宮跡の有力地となっている。