Osaka Prefectural Izumiotsu Nagisa Housing is a residential complex completed in 1999, located in Izumiotsu City, Osaka. Designed collaboratively by the Osaka Prefectural Architecture and Urban Development Division and Spatial Research Institute, this public housing project exemplifies thoughtful urban residential planning from the late 1990s. Situated in the Nagisa district, the complex demonstrates contemporary approaches to multi-family housing design and community living spaces. The building represents an important contribution to Osaka's public housing initiatives during this period and reflects the architectural philosophy and construction techniques of its era.