An empress's mausoleum in Muraida, Maibara — heartland of the Okinaga clan tied to Emperor Keitai's line. Its reported Aso pink-stone coffin, like those at Maruyama and Kabutoyama (id:600, 592), mirrors an Omi linked to Kyushu by lake-borne trade.
Mostly leveled in 1696 temple works, its form and size are unknown (possibly a keyhole; the present knoll is Meiji-era). The works exposed a house-shaped sarcophagus of Aso welded tuff (2.2m) with a crown, sword, and mirror, since reburied. The Kyushu-stone coffin points to the later 5th century — too early for Hirohime (d. 575), scholars note. It stands in Maibara, homeland of the Okinaga clan.
Imperial Household Agency view
Managed by the IHA as the Okinaga Mausoleum, designated (1874) as the tomb of Empress Hirohime, consort of Emperor Bidatsu. Worship from the oratory only.
Field notes
Worship from the oratory (IHA-managed). Near Yamatsuteru Shrine Kofun (id:626), a base for exploring the Okinaga group.