Smart City Project to Enhance the Walkability of Underground Pedestrian Spaces Utilizing Data in the Otemachi-Marunouchi-Yurakucho District

The underground pedestrian network of the Otemachi-Marunouchi-Yurakucho district has been reinforced through developments since the 1980s. This infrastructure disperses pedestrian congestion above ground. Furthermore, underground pedestrian spaces are indispensable infrastructure for barrier-free access, such as commuting in a wheelchair or shopping while walking with a stroller. However, when walking through underground pedestrian spaces, one can observe its labyrinthine complexity. This paper outlines how we collected, maintained, and disseminated data on underground pedestrian spaces.