Kuraigana Island

The Kuraigana Island is a dark and gloomy place somewhere in the Grand Line. It was once the home of the now fallen Shikkearu Kingdom. The forest island is relatively deserted except for some ruins. Amongst its landscape, the island possesses unique hills. This island is also the former residence of the Warlord of the Sea, Dracule Mihawk. Roronoa Zoro was sent here by Bartholomew Kuma during the events of Sabaody Archipelago, and spent two years on the island honing his skills.

History

Past

Nine years before the current storyline, a terrible war was fought on this island. The Humandrills inhabiting the forest, gifted with the capability of learning from humans, watched the conflict, learned how to fight using weapons, and became fearsome fighters. At some point after the war's end, Mihawk arrived on this island and made the castle his home.

Straw Hat Separation

Perona was sent flying here by Kuma's Nikyu Nikyu powers when she told him where she wanted to go if she went on a trip. Upon arrival, she settled in one of the ruins. Roronoa Zoro was later sent to this island by the same Warlord of the Sea. The two met up with Mihawk as he returned from the Summit War of Marineford. Mihawk told Perona about Moria's presumed death, and gave Zoro a little boat to return to his crew mates, later telling him about the island's history and warning him about the Humandrills' threat.

During the Timeskip

This is where Zoro trained under Mihawk for two years.

From the Decks of the World: The 500,000,000 Man Arc

Eventually, Perona and Mihawk began to revitalize Kuraigana Island by tilling the battle-torn land. Seeing this, the violent Humandrills learned how to become peaceful and changed into friendly, helpful farmhands.

Wano Country Arc

After the Levely, the island was surrounded by Marines as they prepared to arrest Mihawk, due to the abolishment of the Seven Warlords system. Mihawk decided to relocate due to the pursuit, when he was contacted by Crocodile with an offer of partnership in a new company, leading them to take residence on Karai Bari Island.