Akama Shrine

Akama Shrine (赤間神宮) is situated in Shimono seki, Yamaguchi Prefecture, on the Kanmon Strait facing Kyushu across the water. The principal enshrined kami (shusaijin) is Emperor Antoku (言仁親王, Tokihito-Shinno), the 81st emperor, who entered the sea at age six during the Battle of Dan-no-Ura on 24 March 1185, held in the arms of his grandmother Nii-dono. The shrine functions as a memorial for his spirit and those of the Heike clan who perished in the Genpei War. From the shrine precincts, visitors can view the ancient battlefield of Dan-no-Ura to the west across the water.

According to shrine tradition, the site originated in 1191 with the construction of an Amidaji temple hall by imperial decree, where an image of Emperor Antoku was enshrined. Throughout the medieval period, the site was maintained as Amidaji temple under Jodo (Pure Land) Buddhism and Shingon Buddhism as a memorial temple. Following the Shinto-Buddhist separation (shinbutsu-bunri) in 1870, the temple was dissolved and the site was reorganised as a Shinto shrine, ascending in rank through Tenno Shrine (1875), then Akama Shrine as a middle-rank state shrine (1889), and finally to its present status as Akama Grand Shrine in 1940.

A medieval tradition holds that Emperor Antoku crossed to the Dragon Palace (竜宮城) beneath the sea. This narrative connects with the broader water-deity veneration associated with Suiten Shrine (福岡県久留米市) and positions Akama Shrine alongside other memorials to the Genpei conflict, such as Wakaichiha Shrine in Kyoto and Suma-dera Temple in Kobe. The prominent "Water Heaven Gate" (水天門), rendered in lacquered dragon-palace style, derives its name from an imperial poem evoking the underwater realm.

The principal festival, the Senteisai (先帝祭, 'Former Emperor Festival'), held 2–4 May, commemorates Emperor Antoku's death through ritual observance. The festival is known for elaborate processions in period costume said to derive from female entertainers of the Heike lineage. Monthly rites on the 24th and the Mimi-nashi Hōichi Memorial (related to Lafcadio Hearn's tale of the earless blind biwa player) are also maintained.