The foundations of a Japanese pagoda were designated as a National Historic Site in 1931.

In addition, a round eaves roof tiles with a lotus pattern have been unearthed nearby.

[2] Per historical records, there was once temple at this location called Miroku-ji, which had been founded by Saichō.

On his return from Tang China, he stayed at a hot spring in what is now Iwai in Inaba Province and saw a large camphor tree from which he carved three statues of Yakushi Nyorai, the healing Buddha.

One of these statues was transferred in the Heian period to the temple of Iwaisan Ensan-ji in Gifu Prefecture, where it is now designated as a National Important Cultural Property.