As one of the hospitals owned and operated by the Japan Organization of Occupational Health and Safety (JOHAS), an independent administrative institution, it is classified as a workplace accident and illness hospital (rōsai byōin). The hospital also functions as a general hospital for members of the public and includes a 24-hour emergency and critical care center.
Yokohama Rosai Hospital has 650 beds, with space for up to 880 beds in the future.[3] The facility comprises three principal buildings: the inpatients' ward, the central clinic, and the outpatients' ward. These three buildings are joined by a series of corridors forming a central indoor plaza.[3]