5,514 Pages

For the chapter of the same name, see Chapter 235.

The Knock Up Stream is a powerful pressurized water stream that shoots upwards to the sky from the bottom. The Knock Up Stream is created by a giant underwater cave filled with gas. At some point in time, the gas pressure is too big and creates a crack in the ceiling, then a giant whirlpool is created from the crack. Once most of the gas gets free, the seabed explodes, sending a giant stream upwards. This event happens only 5 times a month.[1] The strength of each particular event varies dramatically.


So far, the Knock Up Stream has made two appearances:

  1. When a part of Jaya was shot up to the White-White Sea near Angel Island.
  2. When the Straw Hat Pirates used it to travel to the White Sea.[2]


  • Similar natural events do occur in nature like the Knock up Stream and it is likely the event was based on a combination of these natural events. The likenesses include examples such as limnic eruptions, which are the result of a sudden release of carbon dioxide gas from the depth of deep lakes that have failed to cycle their water and geysers, which are fountain-like gushing streams of water caused by extreme heat and pressure.
  • In Greek mythology, the monster Charybdis can be compared the Knock Up Stream. It swallows sailors in whirlpools and shoots them into the air in the same manner as the Knock Up Stream.
  • The Knock Up Stream is not the only method to Skypiea, however, it is the only "all or nothing" method. As described by Gan Fall in Chapter 238, as a result of its gamble, most crews traveling to the Sky Island take more favorable gamble routes to the island.


  1. One Piece Manga and Anime — Vol. 25 Chapter 229 and Episode 149, Cricket explaining about the Knock Up Stream.
  2. One Piece Manga and Anime — Vol. 25 Chapter 236 and Episode 152, the Knock Up Stream sends the Straw Hat Pirates towards Skypiea.
[v · e · ?]
Battles: Battle of Edd War  •  Battle of Marineford  •  Payback War
Incidents: God Valley Incident  •  Ohara Incident  •  Conquest of Four Nations  •  Duel at Banaro Island  •  The Nightmare of Baldimore  •  The Legend of the Sacred Burning Beast of Baldimore  •  Rocky Port Incident
Operations: The Doctor Hunt  •  Operation Utopia  •  Buster Call  •  Operation SOP  •  Grand Reboot 
Periodic Events: Levely  •  Knock Up Stream  •  Aqua Laguna  •  Winter Solstice Festival  •  Fire Festival
Others: Void Century  •  Tea Party  •  Pirates Expo 
Participants and Involvements
Instigators: Jaguar D. Saul  •  Wapol  •  Portgas D. Ace  •  Franky  •  Trafalgar D. Water Law  •  Kyros  •  Kurozumi Orochi
Organizations: World Government (Marines  •  CP9)  •  Demons of Ohara  •  Isshi-20  •  Baroque Works  •  Germa 66 (Vinsmoke Family)  •  Kozuki Family  •  Tontatta Pirates  •  Neo Marines 
Pirates: Roger Pirates  •  Golden Lion Pirates  •  Beasts Pirates  •  Wapol Pirates  •  Blackbeard Pirates  •  Straw Hat Pirates  •  Whitebeard Pirates and allies  •  Big Mom Pirates
Locations: Great Kingdom  •  Mary Geoise  •  Elbaf  •  Wano Country  •  Ohara  •  Edd War  •  North Blue  •  Germa Kingdom  •  Drum Kingdom  •  Alabasta  •  Enies Lobby  •  Karakuri Island  •  Marineford  •  Dressrosa  •  Totto Land  •  Endpoints 
Related Articles
Story Arcs: Drum Island Arc  •  Alabasta Arc  •  Enies Lobby Arc  •  Post-Enies Lobby Arc  •  Marineford Arc  •  Post-War Arc  •  Dressrosa Arc  •  Whole Cake Island Arc  •  Levely Arc  •  Wano Country Arc
Films: One Piece Film: Strong World  •  One Piece Film: Z
Community content is available under CC-BY-SA unless otherwise noted.