The Omishinkanji Kofun is a Kofun period burial mound located in the Omi neighborhood of the city of Gyōda, Saitama Prefecture in the Kantō region of Japan. It was designated a National Historic Site of Japan in 1931.
Wikipedia https://en.wikipedia.org/wiki/Omishinkanji_Kofun
Address (Unnamed Road), Japan
Coordinates 36°9'34.171" N 139°28'36.772" E