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 (シッケアール王国 Shikkeāru Ōkoku?, Muggy Kingdom in the Viz Manga and FUNimation subs). The forest island is relatively deserted except for some ruins. Amongst its landscape, the island possesses unique hills. This island is also the 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.
|Dracule Mihawk||Humandrills||Perona ‡||Roronoa Zoro ‡|
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
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
Anime and Manga Differences
Originally in the manga, the Humandrills were simply hinted at with a silhouette in Zoro's cover story. In the anime, they were given a slightly more detailed foreshadowing with them attacking Zoro in the ruins as ape-like silhouettes.
- The name "Kuraigana" translates roughly to "Gloomy, isn't it?" in English.
- "Shikkearu", the name of the fallen kingdom; could roughly translate to "Oh, it's damp", in English.
- The curly hills on the island resemble the iconic one from Tim Burton's The Nightmare Before Christmas, one of Eiichiro Oda's favorite movies.
- One Piece Manga and Anime — Vol. 54 Chapter 524 and Episode 421, Zoro and Perona are revealed to have been sent to Kuraigana.
- One Piece Manga and Anime — Vol. 60 Chapter 592 and Episode 509, the ruins Zoro and Perona explored are revealed to be inhabited by weapon wielding baboons.
- One Piece Manga — Vol. 82 Chapter 826, the Humandrills have turned peaceful from seeing Perona and Mihawk tilling the land.
- One Piece Manga and Anime — Vol. 95 Chapter 956 and Episode 957.
- One Piece Anime — Episode 456, the Humandrills are foreshadowed more in the anime version of Zoro's coverstory.