An imperial mausoleum at Yoshida, Kashihara, Nara, managed by the Imperial Household Agency as the tomb of Emperor Annei, the 3rd emperor. Nara Prefecture notes that it is also called Aneyama, and that Annei Tenno Shrine of Yoshida once stood on top of the mausoleum.
Official status & archaeological view
Official status
Managed by the IHA as the mausoleum of Emperor Annei, the 3rd emperor; the official form is a hill-form tumulus.
Attribution (jitei): the Imperial Household Agency's determination of whose tomb it manages — separate from heritage designation.
Archaeological view
Kashihara City describes it as a keyhole-like mausoleum at the western foot of Mt. Unebi. The IHA visitor page does not give its archaeological size, construction date, or burial structure.
Field notes
Per the IHA, it is about an 8-minute walk from Kintetsu Kashiharajingu-nishiguchi Station, and worship is generally possible year-round from 8:30 to 17:00. The goryoin (mausoleum seal) is kept at the Unebi Mausolea Office in Kashihara, Nara, where visitors can use it free of charge (reception 8:30–17:00; staff may be unavailable on weekends, holidays, 29 Dec–3 Jan and some other days). Nearby imperial mausolea: Mausoleum of Emperor Jimmu↗, Mausoleum of Emperor Suizei↗, Mausoleum of Emperor Itoku↗ and Toriya Misanzai Kofun (Mausoleum of Emperor Senka)↗.