东京城市圈已经进入了城市发展的成熟阶段，除填海造地外几乎没有新的开发空间，更多的是通过对现有市区进行再开发乃至三次开发完成对城市的更新改造。特别是地铁站附近老朽化的市区、工厂旧址、政府机关使用地等，基于其高度的开发潜力和TOD理念，多个城市更新项目正在进行中。在更新、扩建原本老旧或不完善的基础设施的同时，改善地区防灾性、环境性，通过打造丰富的公共空间等为改善周边城市环境做出贡献。在本次列举的项目中，日建设计参与了从规划到设计、项目管理等多个方面，为东京的城市再生做出了重要贡献。

Tokyo Metropolitan Area has entered a mature stage of urban development. There is hardly any new development space except marine reclamation land. The main method is to complete the urban renewal and transformation through the redevelopment of the existing urban areas and even three times of development. Especially in the old urban area near the subway station, the old factory site, the land of government agencies and so on, based on their high development potential and TOD concept, many urban renewal projects are under way. While renewing and expanding the old or imperfect infrastructure, we should improve the disaster prevention and environment of the region, and make contributions for improving the surrounding urban environment by creating abundant public space. Among the projects listed in this paper, Nikken Sekkei has participated in many aspects, such as planning, design, project management and so on. It has made an important contribution to Tokyo’s urban regeneration.