Gao wei shan gu fen, Numazu

Takaoyama Kofun is a burial mound located in Higashikumado, Numazu City, Shizuoka Prefecture. The shape of the burial mound is anteroposterior, and it is not designated as a historic site. The Numazu Board of Education estimates that the mound was built around 230 A.D. in the early Kofun period and that the burial date is around 250 A.D. It is one of the oldest and largest mounds in eastern Japan during the Kofun period. The Japanese Archaeological Association considers it an extremely important site for elucidating the formation of the Kofun culture, the epoch of Japan's early nation-building process.

The Takaoyama tumulus is also the proposed site of an urban planning road, and Numazu City considers the Numazu-Minami Isshiki Line to be an important route that will form the backbone of the city. Therefore, there have been various discussions on the road construction and the preservation of the tumulus, and measures are being considered to balance the preservation of the tumulus and the road construction project.