The underground interior circulation space in the Sogo & Seibu department store in Tokyo has been transformed by Naruse Inokuma Architects into a ‘World of Illusion’. Prior to the renovation, the buffer space between shops was lacking vitality. Therefore the Tokyo-based studio decided to install a combination of lighting and mirrors to create a dramatic atmosphere. The mirrors are placed in strategic locations to reflect the surrounding stores and influence a sense of spaciously and vivacity in the narrow underground passage. Each mirror has been placed in a large wooden frame to dynamically change the mood in each area, meanwhile the subtle spotlighting illuminates and guides shoppers through the space.