Japan became known as Area 11 after it was conquered by the Britannian Empire. Large deposits of sakuradite in the region prompted invasion and eventual subjugation of the populace, known as elevens under Britannian rule. Use of the terms Japan and Japanese is forbidden by Britannian law.
One of the first usages of the term in popular media was in the program "Code Geass: Lelouch of the Rebellion" wherein the protagonist, an international terrorist, attempts a coup in Area 11 in an attempt to reform the independent nation of Japan. The broadcast of this program has been squelched in public by Britannian authorities but underground distribution thrives. Theorists speculate that the popularity of this movement is due to the strong nationalism of the local inhabitants of Area 11 rather than the inherent QUALITY of the broadcast. As of 2008, Britannian authorities see these stirrings as a nuisance and report cultural and political stability in Area 11.
Area 11 produces nearly 70% of the world's sakuradite supply and over 95% of the world's animu supply.