Danpusan Kofun

The Dampusan Kofun is a large keyhole-shaped kofun burial mound located within the grounds of the Atsuta Shrine complex in the Hayata neighborhood of Atsuta-ku, Nagoya, Japan. The tumulus was designated a National Historic Site of Japan in 1987. Per legend, the tumulus is the tomb is Miyazuhime, the wife of Prince Yamato Takeru, whose purported grave is located nearby.

Source: Wikipedia