As the place-name "Kashiara" had been lost so early that remains of Imperial Palace had been unknown for a long time; however, many historians began to collect legends and old books according to the description "Unebiyama Tonan Kashiharachi" from the Edo period and after, so as to accumulate the achievements of collection.
「橿原」の地名が早く失われたために宮跡は永らく不明であったが、江戸時代以来、多くの史家が「畝傍山東南橿原地」の記述を基に口碑や古書の蒐集を行っており、その成果は蓄積されていった。