The Yajikubo tumulus is located on the south slope of a hill in an approx. 1.8 km northwest of the two remains described above, featuring that it is built in the land shape called 'yamayose' in which its southern part is lower than the north, east and west parts.
谷地久保古墳は、上記2遺跡から約1.8キロメートル北西の丘陵南斜面に立地し、北・西・東の三方が高く南が低い、「山寄せ」と呼称される立地上の特質をもつ古墳である。