It was Iware no Mikakuri no Miya Palace in the capital (which was reportedly located at Mizushi-jinja Shrine in Higashi-ikejiri-cho, Kashihara City, Nara Prefecture).
都は磐余甕栗宮（いわれのみかくりのみや、奈良県橿原市東池尻町の御厨子神社が伝承地）。