The Kai Kodo Residence, located in Oita City, Oita Prefecture, stands as a notable residential work designed by Kurokawa Tetsuro in collaboration with Design League. This private home exemplifies the architectural philosophy of its designers, showcasing innovative spatial solutions and thoughtful integration of contemporary design principles. The residence demonstrates the architects' commitment to creating functional yet aesthetically compelling living spaces. Though the exact completion date remains undocumented, the Kai Kodo Residence represents an important example of modern residential architecture in the Oita region, reflecting the design sensibilities of its era and offering valuable insights into the collaborative approach between the renowned architect and Design League.