Akiha Grand Shrine (Akihasanyama Hongu Akiha Shrine)

Akiha Grand Shrine (Akihasanyama Hongu Akiha Shrine) is situated near the summit of Mount Akiha, elevation 866 metres, in the southern reaches of the Akaishi Range in Tenryū ward, Hamamatsu, Shizuoka Prefecture. It serves as the principal shrine for the Akiha shrine tradition, with approximately 400 affiliated shrines nationwide under the Association of Shinto Shrines. The shrine is known as a guardian deity against fire.

The shrine occupies a dual-shrine layout, with an upper sanctuary at the mountain peak and a lower sanctuary at its base, in the upper reaches of the Keta River, a tributary of the Tenryū. Mount Akiha has long been a site of mountain worship (sangaku shinko). During the early modern period, it became a sacred site associated with *Shugendo* (mountain-ascetic practice), drawing pilgrims organised under "Akiha societies." Together with Sengen Grand Shrine (Fujisan Hongu Sengen Taisha) in Fujinomiya, Shizuoka, it forms the spiritual centre of mountain-based ritual practice in the Suruga and Tōtōmi regions.

The principal enshrined kami (shusaijin) is Hinokagutsuchi-no-Okami. According to the *Kojiki* (Records of Ancient Matters, 712 CE), when Izanami-no-Mikoto gave birth to the fire deity Kagutsuchi, her genitals were burned, and she died. An enraged Izanagi-no-Mikoto then split Kagutsuchi with his sword. Because of this fire-deity character, veneration of the shrine as a protector against fire spread widely from the medieval period onward in castle towns and urban settlements. The shrine ranks as one of Japan's two major fire-prevention shrines, paired with Atago Shrine in Kyoto.

Tradition holds that the shrine was founded in 709 CE (Wado 2). From the medieval period, Mount Akiha became known as a sacred site of Akiha Daiagongen (a syncretised kami-buddha form). In the early modern period, frequent fires in Edo spurred the formation of "Akiha societies," and pilgrimage to the shrine spread nationwide. The Shinto-Buddhist separation (shinbutsu-bunri) of the Meiji period (1868) separated the Buddhist elements of Akiha Daiagongen, and the shrine was reorganised as a sanctuary dedicated to Hinokagutsuchi-no-Okami. It held prefectural status during the Meiji period and now ranks as a shrine of particular significance.

The principal annual festival is the Akiha Fire Festival (Akiha no Hi Matsuri), held on 15–16 December. Centred on a fire-prevention ritual featuring three dances—with bow, sword, and fire—the festival continues an observance tradition traceable to the early modern Akiha societies.