Additionally, as ancient structural remnants similar to Kodai Sanjo, the sixteen Kogo-ishi (rows of stones arranged on mountain slopes in Kyushu and Western Japan; also refers to "a mountain castle of Kogo-ishi style"), including Kinojo (ogre's castle) in Soja City (It was designated as a national historical site in 1986), were discovered throughout Japan.
また古代山城に類似した遺構として、神籠石（式山城）が総社市・鬼ノ城（1986年国の史跡に指定）など日本各地で16城発見されている。