Great Ground is both a roaming island and the colossal Sea King carrying it on its back across Paradise, appearing in the game Legend of the Rainbow Island. The land and the beast share a single name, and the creature's moods can shake the whole settlement above it.
The island riding atop the Sea King is small, crowned at its center by tall, spike-shaped peaks. A thick forest rings the coast around those spikes, parted only by a single town lying to the south. Its layout includes Great Ground Port on the southern shore and Cola Village, the lone settlement, nestled between the harbor and the mountains. On the Log Pose route it sits after Royal Sun Island and before Festa Circle.
The Sea King possesses its own magnetic field and a striking awareness of what happens on its back, able to tell who is actually present on the island. When provoked to anger it thrashes its body, sending earthquakes rippling across the land above.
Long ago the island called Great Ground was raised upon the Sea King's back. Among its forests lives a giant sea turtle, the island's guardian, which had triplet hatchlings, one of them the pet of Cola Village's Maya, the only person it trusts and can speak with. During the events of the game, Reira and Harry triggered an explosion on the creature's back, throwing the island into a violent quake, though the shaking stopped the instant they departed. Great Ground stands as the first island built upon a great living animal, later echoed by Mecha Island and Zou, yet unlike those it remains reachable by ordinary Log Pose.

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Great Ground is both a roaming island and the colossal Sea King carrying it on its back across Paradise, introduced in the game Legend of the Rainbow Island. The land and the creature share a single name, and the beast's moods can shake the whole settlement above it.
On the Log Pose route, Great Ground sits after Royal Sun Island and before Festa Circle. Its layout includes Great Ground Port on the southern shore and Cola Village, the island's only settlement, nestled between the harbor and the mountains.
A giant sea turtle living among Great Ground's forests serves as the island's guardian. It had triplet hatchlings, one of which is kept as a pet by Maya of Cola Village, the only person the turtle trusts and can speak with.
The Sea King carrying Great Ground on its back has its own magnetic field and can sense exactly who is present on the island above it. When provoked to anger, it thrashes its body, sending earthquakes rippling across the land.
Great Ground is the first island shown to be built upon a great living animal, a concept later echoed by Mecha Island and Zou. Unlike those islands, Great Ground remains reachable by an ordinary Log Pose.
Looking for more on Great Ground? The One Piece Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the One Piece anime series, manga, and official materials. Episode and chapter references are cited where applicable.
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