It has been presumed from the item of Hyohanki of October 15, Ninan Gannen (the 1st year of Ninan era) that, the cardinal point to measure the distance when taking Daijyouegokeitenchi lying on the direction of east and west. Thus the possibility has been shown that such point should be placed inside of the Seiryouden, not placed in the Higashinomigiri (East side) of Seiryouden or the Hitujisarudan (Southwestern of the plat) of Shishiiden as others considered.
