It was announced on February 1, 2007 that remains of structures and stone walls, which are estimated to date back from the early to mid-seventh century, were discovered at the Toroku site, and the unearthed objects are drawing attention as possible remains of Soga clan's residence.
2007年2月1日、東麓遺跡において7世紀前半から中頃のものと見られる建物跡や石垣を発見したと発表され、蘇我氏の邸宅跡ではないかと注目されている。