Onigashima[note 1] was an island off the southern coast of Jakoku located on the west side of the Izami region. It acted as a major trading hub with the western world during Jakoku's largely isolationist era.


Early HistoryEdit

At some point, the island became a part of Jakoku, having a single harbor with the town of Enbizaka being founded in its center. Following the end of the civil war in EC 549, Gaou Octo was promoted to magistrate of the region, later sealing the Twin Blades of Levianta in a cave in Mount Inasa. Starting in EC 580, any foreigners captured by Gaou and his successors were deported to Onigashima, becoming a center for limited trade with foreign nations.[1]

Western OutreachEdit

In EC 838, a fire ravaged Enbizaka, wiping out a large part of Onigashima's population and architecture; the town was rebuilt over the next four years. In EC 842, the island's population was thrown into a panic following the Enbizaka Murderer Scandal perpetrated by Kayo Sudou. Ten years later, a Maistian fleet led by Perrié Cutie Marlon forced Onigashima and the rest of Jakoku to end its isolationism and conduct full free trade with foreigners.[1]



Main Article: Enbizaka

A city in the middle of the island, located along the hill slopes. It became a hub for trade during the EC 800s, and contained numerous shops and firm branches. It was the site of the Enbizaka Murderer Scandal.

Mount InasaEdit


Mount Inasa[note 2] was a volcano located north of Enbizaka. It had at least one cave.

Abandoned TempleEdit

An empty temple located on the Inasa mountainside. Originally used by Buddhist monks, it was later abandoned by the EC 800s. The Crimson Robed Masses later approached the area in EC 838 and used the temple as a hideout well into the EC 840s.


A port for ships. It mainly accepted merchant ships from foreign countries.

Known InhabitantsEdit


Conceptualization and OriginEdit

  • Onigashima is the name of a mythological Japanese island where oni, the Japanese equivalent of demons or ogres, reside; Jakoku, where Onigashima is located, is inspired by Japan.
  • In a livestream, mothy stated that Enbizaka is inspired by Dejima, an artificial bay built by merchants that served as the single trade hub for Japan and other countries during the Edo period.
  • Inasa is the name of a beach that appears in a legend featuring Takemikazuchi, a thunder god in Japanese mythology, attempting to subjugate the Izumo province from the local deity Okuninushi.




  1. 鬼ヶ島
  2. 伊耶佐山
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