In addition, after Tadashi SEKINO discovered the substructure of Daigokuden and conducted research on the restoration of Heijo-kyu Palace, its results were published as "Heijo-kyu oyobi Daidairi ko" in 1907.
さらに関野貞は、大極殿の基壇を見つけ、平城宮の復元研究を深めて、その成果を『平城宮及大内裏考』として1907年（明治40）に発表した。