Outer World

Outer World (NA) or Gaikai (JP) in the anime Final Fantasy: Unlimited refers to worlds that are not or yet to be consumed by Chaos. This includes Earth in Unlimited from which the anime started off. The Outer World is the contrast of Wonderland, Inner World or Ikai.

The only Outer World seen in the anime is Earth, mainly taking place in the countries surrounding or near to the Sea of Japan, where the Pillar of Darkness appeared. These countries are Japan, China, Russia and South Korea.

China
China is the place where Lisa Pacifist grows up learning the Kigen Arts with her mother. After her mother died, Lisa moves out to Russia to stay with her father, Tsar Pacifist.

Japan
Japan is home to the twins Ai and Yu and the Hayakawas Joe and Marie. Their home is more specifically located in the island of Sadogashima.

Russia
While it is unknown where the C2 Organization is really based, the story of FFU: After takes place in this country.