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Stomach Baron is a species of giant carnivorous seaborne plants that form the chains of "islands" in Boin Archipelago. Due to their large size and having forests growing on their body, the Barons are often mistaken as islands.[1]


The forests have "plants" that are made of a variety of highly nutritional and delicious food in the middle of the island (which is actually the "mouth" of the Barons) luring prey (including sea kings) to venture there before the Barons consume them.[2]

Former InhabitantsEdit


Straw Hat's Separation SerialEdit

When Usopp was sent here by Bartholomew Kuma, he succumbed to gluttony and gorged on the many delicacies within the forest until he became morbidly obese, and nearly got eaten alive when he tried to escape after reading about his captain's tragic loss when a newspaper fell from the delivery bird.[3][4]

It was here that Heracles trained Usopp during the timeskip. Heracles taught Usopp everything he knew about fighting techniques, the nature of the forest such as Pop Green, so that he may grow strong and to become a true Sniper.[5]


  • The concept of the Stomach Baron is very similar to the Gourmetica insularis described in the 1999 novel „Die 13½ Leben des Käpt’n Blaubär (キャプテン・ブルーベアの13と1/2の人生 Kyaputen burūbea no 13 to 1/2 no jinsei?) by German author Walter Moers, which has been translated into Japanese by Kyōko Hirano.[6]


  1. One Piece Manga and Anime — Vol. 54 Chapter 524 and Episode 420, The Boin Archipelago is seen as, initially believed, islands.
  2. One Piece Manga and Anime — Vol. 56 Chapter 550 and Episode 455, Heracles leads Usopp to the Forest of Gluttony.
  3. One Piece Manga and Anime — Vol. 56 Chapter 551 and Episode 455, Usopp gorges himself in the Forest until he became morbidly obese.
  4. One Piece Manga and Anime — Vol. 60 Chapter 591 and Episode 455, Usopp nearly got eaten by the Stomach Barons.
  5. One Piece Manga and Anime — Vol. 61 Chapter 596 and Episode 515, Usopp trains with Heracles on the Archipelago.
  6. (German)

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Boin Archipelago
Inhabitants: Heracles  •  Usopp 
Weapon Based: Pop Green  •  Usopp's Arsenal (Kuro Kabuto)
Related Articles
Story Arcs: Amazon Lily Arc  •  Post-War Arc
Cover Stories: Straw Hat's Separation Serial
Other: Stomach Baron
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Plants and Fungi
Plants: Thousand-Year Trees   •  Daft Green  •  Giant Jack  •  IQ  •  Kona Tree  •  Lily Carnation   •  Mescal Cactus  •  Pop Green  •  Sakura  •  Stomach Baron (Boin Archipelago)  •  Sunlight Tree Eve  •  Treasure Tree Adam  •  Tree of Knowledge  •  Weather Ball  •  Yarukiman Mangrove (Sabaody Archipelago)  •  Kuuigosu  •  Elegant Sunflower  •  Mosa Mosa no Mi 
Fungi: Amiudake  •  Body Mushroom  •  Noko Noko no Mi 
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