赤門上古墳 (Akamonue Kofun)
The Akamonue Kofun in Hamamatsu, Shizuoka is a keyhole-shaped kofun burial mound protected by the prefectural government as a national historic site. Located on the eastern edge of the Mikatahara plains and near the Tenryu River, it is one of the several kofun in the area. It takes its name from the red gate of a nearby Buddhist temple. It was excavated in the summer of 1961 by a team of students from the Shizuoka Prefectural Hamana High School under the direction of the Hamamatsu City Cultural Affairs Department.