The tumulus was designated a National Historic Site of Japan in 1927, and its borders were expanded in 1955.

[1] The Futago Kofun is a "two conjoined rectangles" type (zenpō-kōhō-fun [ja] (前方後方墳)), located in the on the Hekikai Plateau in Yahagi River basin in western Mikawa.

[2] The Futago Kofun first appears in academic literature in 1887, at which time it was crowned by the small Sakurai Tenjin Jinja Shinto shrine.

In 2003, the Anjō City Board of Education conducted a survey by excavating a total of five trenches.

The site is about 10 minutes on foot from Horiuchikōen Station on the Meitetsu Nishio Line.