Win–Win Situation Between Urban Developments and Underground Spaces (The Case Study of Tokyo Midtown Hibiya)

In 2018, Tokyo Midtown Hibiya was completed and opened in Hibiya, Tokyo. This is a large-scale complex urban redevelopment project in central Tokyo. At this time, the underground passage outside the site of the project and the underground square in the site were prepared. This has dramatically improved the dynamics of moving lines, which were conventionally vulnerable when crossing over subways. Tokyo is a city which rapidly became urbanized after World War II. The utilization of underground spaces is effective, but the space cannot be afforded in the progress of urbanization. This paper introduces Tokyo Midtown Hibiya as a good example showing the Win–Win situation between urban developments and underground space creation.