National treasure. The dotaku (bronze bell ) unearthed from the Kamo Iwakura site have a nested structure. In this way, No.39 dotaku was set into this dotaku. In the center of the handle, the mark 'X' has been inscribed. It was made from the same mold as bronze bells No.32 amd No34 from the Kamo-Iwakura site, Kamiyashiki dotaku in Tottori prefecture and Sakura-ga-oka No3. dotaku unearthed from Hyogo prefecture.