The Akihasan Hongū Akiha Jinja (秋葉山本宮秋葉神社) is a Shinto shrine in Tenryū-ku, Hamamatsu (the former town of Haruno in Shizuoka Prefecture, Japan). The shrine is located near the summit of Mount Akiha, on the southern slopes of the Akaishi Mountains. It is the head shrine of the 800 around the country. The main festival of the shrine is held annually over three nights in December, and features ceremonies using huge flares and other fireworks.