However, now it is assumed that the ruins are Koga-ji Temple or Kokubun-ji Temple of Omi Province which had been built for a Great Buddha in Shigaraki no Miya Palace before Todai-ji Temple was built.
しかし、現在では東大寺に先駆けて紫香楽宮で大仏建立を行った甲賀寺または近江国国分寺跡と推測される。