The Sūfuku-ji temple ruins (崇福寺跡, Sūfuku ato) is an archaeological site with the ruins of a late Asuka through Muromachi period Buddhist temple located in the Shigasato neighborhood of the city of ŌtsuShiga Prefecture, in the Kansai region of Japan.

Archaeological excavations indicate that the temple ruins are located on three ridges extending south from Mount Hiei.

It is known in historical records that Emperor Tenchi relocated the capital of Japan to Ōtsu and resided there for a brief period from 667 to 672 AD.

However, around the same time, the Minamishigachō temple ruins with tiles from the Hakuho period and the foundation of a pagoda were found.

Others argued that the Minamishigachō temple ruins corresponded to Sūfuku-ji as Hakuho period roof tiles had been excavated at that location.

The "Shigasato Yamanaka site" yielded no artifacts earlier than the Heian period, although the layout of buildings appeared to correspond to what was known of Sūfuku-ji.

The contractor hired to survey and excavate the pagoda foundation had worked on a previous site and knew of the possibility that it contained some type of buried treasure.

Digging the site on his own, he presented the container to the archaeologists, who were amazed that an amateur apparently knew exactly where to look.

After police interrogation, the contractor and his local accomplices admitted to robbing the site, and a mirror and several silver coins were recovered, but other objects which had been stolen were lost.

Inside, there is a stud to hold the jar, which is flower-shaped with 8 petals bordered with a flower-shaped dotted line carving, a similar motif to objects from the Kofun period and early Asuka period found on Okinoshima and at Hōryū-ji.

The outer and inner boxes were filled with plaster-like mud, and two amethyst and 14 perforated Nanjing balls were found.

The accompanying iron mirror has a diameter of 7 cm, with a gold-copper plate is attached to the back and fastened with a silver edge.

The site is located about a 20-minute walk from the Minami-Shiga Station on the Keihan Electric Railway Ishiyama Sakamoto Line.