Jail Island

game

Jewel Island is the main setting of the game One Piece: World Seeker. It is under the control of the Marines.

Geography
Jewel Island is a lush, green island with multiple elevated surfaces and precious stone formations. It is stated to be rich in natural resources.

Jail Island
Jail Island is a large prison tower being built on the highest part of Jewel Island.

Citizens
The citizens of Jail Island are split into two factions: "Pro-Marine" residents who accept Marine control and their modernization projects, and "Anti-Marine" residents who prefer tradition.

Past
Sometime in the past, a war occurred over the use of resources on the island. Eventually, the Marines intervened and rebuilt the island, establishing a large presence there while modernizing the residents' way of life. This led to a split forming between those who supported the Marines and those who did not.