抄録
The earthen wall with brick tiles on the Former Imperial Audience Hall of State Compound in Nara Imperial Palace has incomprehensible outlines. I found once that it was designed with three concentric circles and the eccentric circle. Besides three concentric circles and the eccentric circle are severally equivalent to Zone of Perpetual Apparition, equator, Zone of Perpetual Occultation and ecliptic. On this paper I guessed that the plan of the earthen wall is similar to the fabulous bard “Yatagarasu”, the eccentric circle become the sun which the bard lives in, and the 3:8 inclination of wall was involved in the bard’s character. The twin Imperial Halls of State Compounds in the Nara Palace were related to the configuration “Taibi-kyu”. The central Halls were designed as the five emperors’ seats and the eastern Halls were designed as twelve ministers. The number of the buildings related to the cosmos on the astronomical Chinese literature.
