Name: Kuchiyose: Gamaguchi Shibari, 口寄せ・蝦蟇口縛り, literally "Summoning: Toad Mouth Bind", English TV "Ninja Art: Toad Mouth Trap"
Type: A-rank, Offensive, All ranges
This jutsu encloses the surrounding area with the esophagus of a great, fire-breathing toad from Mount Myoboku: Rock Lodging (妙木山・岩宿,Myōboku-san: Iwayado). Jiraiya can then control the esophagus, causing it to expand, contract, or grow in whatever direction he wishes. In a filler arc, Jiraiya uses a variation of this jutsu when he summons an able-bodied toad's stomach to protect himself and Naruto from Kagero's Ephemeral Vengeance.
When first used, Jiraiya claimed that no one had ever escaped from this jutsu. Itachi Uchiha and Kisame Hoshigaki manage to escape, however. Itachi uses his Amaterasu to burn through the esophagus.
In the video games, parts of the esophagus also spew fire, which fits with Jiraiya's description of the animal the toad esophagus originates from.