Preservation and Restoration of Tokyo Station Marunouchi Building

Abstract

Tokyo Station Marunouchi Building is a huge structure—an over 330 m-long and three-story high brick building completed as the central station of Tokyo about 100 years ago. The roof and the inside were burnt down in 1945 during World War II, and it had existed in a temporarily restored form since then. For the purpose of preservation and restoration of the building to its original appearance, an isolation system was adopted. Although the building has a complex location relative to nearby structures, as many as 352 isolators with 158 oil dampers have made it possible to control the shaking of the building. This work was carried out safely while many passengers used one of Japan's largest terminal stations every day