Yorito enters this world by literally falling from the sky. Having faced the Yamibito throughout the game, he is shocked by what he sees. The area he has landed in is filled with Yamibito in a marketplace. Unable to tell if he has gone completely insane or whether this is actually real, Yorito snaps and pulls the trigger of his machine gun, firing at any Yamibito he comes across, while ones who have not been killed flee.
An Archive actually comes from this dimension; it is a childish drawing of Yorito massacring Yamibito. The Yamibito language is shown in the drawing. The writing, in translation, recounts Yorito's appearance, called a "scary monster", and that he is the first human to appear after all previous ones were killed. This proves that Yorito was not hallucinating and that this world does actually exist. Just as well, the location is referred to as "Unknown" on the Link and Archive Navigators.