Our company was responsible for the design, planning, and construction of "H¹O," a rental office operated by Nomura Real Estate Co., Ltd. Based on the concept of "HUMAN FIRST OFFICE," H¹O is a flexible office developed with a focus on supporting each individual working there, rather than the company as a whole, emphasizing individual capabilities, security, and comfort. Normally, clients acquire land and start from building construction, but in this project, we took a first-of-its-kind approach by becoming a tenant in an existing facility. For the interior design, we aimed to create a design plan inspired by the history and memories of Yokohama, as well as realizing a shared environment where each person working there can feel comfortable. Furthermore, in the equipment design, we worked closely with the facility management, the client, and collaborating companies to realize the high-spec equipment requirements for H¹O within the constraints of the existing building. In order to support each individual working there, the new H¹O office was realized in Yokohama through the collaboration of in-house and external designers and engineers who participated in the project.