Hiraoka Shrine is located in Higashi-Osaka City, Osaka Pref. The Main Hall painted in vermillion in Kasuga-zukuri style (the same basic form as Kasuga Taisha) stands facing west. According to the shrine leaflet, it dates back to 3 B.C., when Amenotane-no-Mikoto, the ancestor of Nakatomi Family and a liege of the emperor Jinmu, set up a shrine under the order of the emperor to worship Amenokoyane-no-Mikoto and Himemikami. As the shrine was built at the top of Mt. Kamitsu and the summit was flat, it came to be called “Hiraoka (a flat hill).” The historical events concerning the shrine are recorded in the literature of “Goshintoku-ki” owned by the shrine and it is now considered a precious document of Hiraoka City. The leaflet further goes that the enshrined Amenokoyanen-no-Mikoto is the divine ancestor of Nakatomi, later Fujiwara Family and also the first deity enshrined in this country. Part of the soul of the deities enshrined in the third and fourth halls were later sent to Kasuga Taisha, so the shrine crests of the both shrines are the same “Sagari-fuji (hanging wisteria). The ceremony of “Kayuura Shinji (fortunetelling by rice porridge)” is a prefectural Intangible Cultural Asset. The walking trail starting at the western foot of Mt. Ikoma is popular among hikers. On the trail is a small forest called “Kamitsudake no Mori,” where Kamitsudake Hongu (the original ancient shrine) is located. In spring the mountain is crowded with people who came to see Hiraoka Plum Orchard next to the shrine.