Completed in March of 2010, the Center Building is the entrance to the OIST Main Campus and the center of administrative operations, housing senior executive and other administrative offices. The Center Building also includes three large seminar rooms, the Library, the OIST café, the Visitor's Center, the Health Center, and the Center Court. Beneath the building lies the central plant for the university, where water treatment, cooling systems, and other vital facilities are managed.
Self-guided visitors are free to visit levels B and C of the Center Building, including the Center Court, the Café, and the Skywalks to Laboratories 2 and 3.
The Engineering Support Building houses the Mechanical Engineering Center workshop which resides on the first floor and the Building and Facilities Management Division office on the second.