Continuing with the pop-up store phenomenon that we seem to be in the midst of,Louis Vuitton has teamed up with Japanese retail brand Seibu (info), in opening a temporary outlet in Seibu’s gigantic Ikebukuro department store in Tokyo  – The Louis Vuitton/ Underground/ goes with a raw and industrial look and is completely different in terms of interior than other Vuitton spaces. LOUIS VUITTON underground is a concept store, and will only be running for a limited period of time…