Inside Buu (ブウの中) is the inside of Super Buu.
The inside of Buu is first shown when Super Buu absorbs Vegito, while the Saiyan fusion is protected by his Saiyan Shield. The Potara fusion can not be supported by the environment inside Buu, and is then nullified once the Saiyan Shield is removed. Separated, Goku and Vegeta explore the inside of Buu. They fight enzymes, a roundworm family, illusions of Gotenks, Gohan and Piccolo, and Super Buu materialized inside himself. Then, they free their friends and sons as well as the fat Majin Buu from Super Buu's body and then escape Buu's body through one of the holes on Buu's head.
The inside of Super Buu is explored in Dragon Ball Z: Buu's Fury. Goku and Vegeta visit Buu's stomach, intestines, and brain. Enemies encountered there are blood cells, blisters, enzymes, and roundworms.
Majin Buu's Stomach is a Location-type card in the Dragon Ball Z Collectible Card Game. While it is in play, all attacks do +2 power stages of damage, and all Fused Personalities in play defuse and cannot fuse while this Location is in play.
- The area from the stomach that leads to Buu's brain is called intestines in Buu's Fury, while it should have been called esophagus to be consistent with regular anatomy.