Abstract
On this paper, Part 6, we have investigated Daigoku-den, Chodo and Zen-den in Nagaoka-kyu and Heiankyu. Main contents of this paper are as follows : 1) Both Daigoku-den of Nagaoka-kyu and Heian-kyu are supposed respectively to have been the halls of state at Gaicho, or Chodoin, located in the central precinct of the Palace grounds separated from the imperial residential area, Kinsho. 2) Both the supreme halls of Nagaoka and Heian Dairi are described as Zen-den in the texts prepared in the early Heian period. It makes a striking contrast to the fact that the supreme hall of Heijo Dairi is described as Naian-den in the Shoku-nihongi. Judging from the functions of the supreme halls of Nagaoka and Heian Dairi in Kinsho, it is presumed that these supreme halls had a close resemblance in character to Daian-den of Heijo-kyu, the state chamber of Kinsho, in the reign of the Emperor Shomu.
