Iwazononiimasu takumushitama-jinja, Shinto shrine in Japan

Iwazononiimasu takumushitama-jinja is a small Shinto shrine in Yamatotakada featuring a single main hall built in Kasuga-zukuri style, recognizable by its distinctive roof with vertical and horizontal wooden poles. The white-painted walls and bright red supporting pillars create a modest building centered around a welcoming veranda at the front.

The shrine stands on the legendary site of Katashio no Ukiana no Miya, the palace of Emperor Annei, the third emperor; its founding date is unknown. It is recorded in the Engishiki shrine register as "Isono ni masu Takumushitama Jinja, two seats" of Katsuge County, Yamato Province, a major shrine receiving monthly and harvest offerings. In 859 it was raised from junior fifth rank, lower grade, to junior fifth rank, upper grade. It became a prefectural shrine in 1931 and was added to the Association of Shinto Shrines' Beppyō list in 1966.

Locals call the shrine Ryūō-gū, the Dragon King Palace. Tradition links it with Ōmiwa Shrine as the dragon's head and Nagaō Shrine in Katsuragi as its tail, this shrine forming the body along the Yokōji road. The name may derive from Takumushitama-no-kami, though a theory holds that 'mushi' miswrites 'zu'.

The shrine stands in Kashio-chō, a short walk from Kintetsu Takada-shi Station on the Minami-Osaka Line, and National Route 166 runs past it. The grounds sit on the site traditionally linked to the Kashio-Ukiana palace of Emperor Annei. Visitors reach the shrine on foot from the station, so allow time to walk through the surrounding streets.

The shrine stands on the site associated with Katashio no Ukiana no Miya, the palace tradition of Emperor Annei, the third emperor. Along the Yokooji road, a local tradition makes Omiwa Shrine the dragon's head, this shrine the dragon's body and Nagao Shrine in Katsuragi the dragon's tail.