The Dojo is where all the moderators are hiding out during the events of Club Penguin Shutdown. They first sent Ninja out to check on why the mascots haven't left, although this caused his death. Later, they kicked out Businesmoose for him to check out what happened to the Tuba Gang. It is unknown where Sensei is, or if he's in the Dojo. We do know that every moderator is hiding there.