Detective Conan, also known as Case Closed, is a long-running Japanese anime and manga series about a teenage detective trapped in a child's body who solves mysteries. Door sounds are a recurring part of its everyday scenes, marking entrances, investigations and quiet discoveries. Short clips like this one have circulated on soundboards and in fan edits because they are instantly usable, clean and easy to recognise. Editors keep returning to it for anime-style transitions, mystery reveals and roleplay videos where a simple door cue sets the scene.