In Bordeaux, France, the architecture firm IT’S has completed the Mokuzai building, a mixed-use structure combining office and ERP (enterprise resource planning) spaces. The project, developed by Nexity and Cogedim, is part of the Belvédère ZAC, a planned urban development area. The building covers 7,500 square meters and was constructed with a budget of 16.97 million euros. It is positioned as a gateway to the Belvédère district and the city of Bordeaux, with several facades designed to interact with the surrounding environment and urban fabric. The building features a unique architectural layout, with the northeast facade on Impasse Tregey welcoming people entering the district and the city. The north facade, facing Boulevard Joliot-Curie, serves as the main entrance, while the south facade opens to Eiffel Park, inviting pedestrians into the building. The roof, visible from surrounding buildings, is considered a "fifth facade" and has been designed with greenery integrated into its structure. This design emphasizes the building's connection to the landscape and its role in enhancing the urban environment. Mokuzai is notable for its innovative use of materials and construction techniques. The building combines wood and concrete in its structure and was constructed using off-site methods to reduce environmental impact and construction time. The ground floor is porous, allowing visual and functional continuity between the interior and the boulevard. The design also reinterprets the materials of the traditional stone city, using vertical decorative masonry to highlight the building's integration with the local context. The facade piers vary in size and shape, becoming narrower as they rise, and the use of prefabricated concrete elements enabled detailed and varied decorative elements. The name Mokuzai, which means "wood" in Japanese, reflects the building's emphasis on natural materials and the cultural significance of nature in architecture. The design follows principles of biophilic design, which prioritize the emotional and psychological benefits of connecting with nature. The building, which houses the headquarters of the MSA (a French social insurance organization), combines medical services for its members with office spaces for employees. The ground floor includes medical offices, support spaces, and areas for social interaction, all organized around a large, flexible double-height hall. The higher floors are dedicated to office spaces, designed to encourage collaboration and well-being through loggias, greened terraces, and natural light. The integration of vegetation, including large trees in deep planters, enhances biodiversity and creates a connection between the building and the city's natural environment.