Ōbara-dera temple ruins, Buddhist temple ruins in Sakurai, Japan.

Ōbara-dera temple ruins occupy a hill behind Tenman Shrine at the south end of the Ōbara settlement in Sakurai. The site has not been excavated, so the layout and scale of its halls remain unknown. At the pagoda base, a central foundation stone and other footings are visible; the stones lined up on the lower ground to the east were moved there from around the thirteen-story stone pagoda to the west, on ground called Kondō, where foundation stones suggest the main hall stood.

The temple's founding is recorded in the inscription on the bronze finial cap (fukubachi) of its three-storey pagoda, now a National Treasure held by Tanzan Shrine. Nakatomi no Asomi Ōshima vowed to build a temple in memory of Prince Kusakabe; after his death, Hime no Asomi Nukata began construction in 694, completing the main hall and a 4.8-metre Shakyamuni image, and the pagoda followed in 715. No excavation has been carried out, so the layout remains unknown.

The temple's name is recorded on the bronze伏鉢 finial of its three-storey pagoda, now a National Treasure held by Tanzan Shrine. The inscription names Nakaomi no Asomi Ōshima, who vowed to found the temple in memory of Prince Kusakabe, and Hime no Asomi Nukata, who began construction in 694. Some scholars identify Nukata with the poet Nukata no Ōkimi.

The site is accessible through local transportation and sits near Sakurai Station with clear paths to the grounds. Visitors should keep in mind that the ruins are in an open area and protection from rain or intense sun may be necessary.

The temple's name and founding are known from the inscription on the bronze伏鉢 finial of its three-storey pagoda, now a National Treasure held by Tanzan Shrine. It records that Naka no Omi Ōshima vowed to found the temple, work began in 694 under Hime no Omi Nukata, and the pagoda was finished in 715.