Mount Atago (愛宕山, Atago-yama) is a mountain on the border of the cities of Minamibōsō and Kamogawa in Chiba Prefecture, Japan with an altitude of 408.2 m (1,339 ft).

Mount Atago is at the west of the Mineoka Mountain District of the Bōsō Hill Range.

[1] Mount Atago was located in the historical Awa Province, which occupied the southern tip of the Bōsō Peninsula.

He visited Mount Atago, dedicated a Jizō Bosatsu statue at the summit of the mountain, and vowed to return to the area.

Construction on the radar facility began in 1978 and is considered to be strategically important to the defense of Japan.