Inner Storage Technique - a ninjutsu that allows hiding objects inside one's own body and extracting them from there at will. The user swallows or draws in an object, temporarily placing it in a special internal space, protected from damage and outside detection. When necessary, the item is called back through the mouth. Orochimaru thus swallowed scrolls and stored the Kusanagi sword in a snake, releasing it through the snake's throat directly in battle. Kinkaku extracted from his mouth the legendary tools of the Sage of Six Paths.
An experienced user is able to store various items inside the body without the slightest discomfort, including bladed weapons and large scrolls.