Core House, completed in 2012 in Ishinomaki, Miyagi Prefecture, represents a minimalist residential and office design conceived for regional revitalization in the Oshika Peninsula. Developed by the Archiaid Peninsula Support Study Group Core House Working Group, this innovative structure exemplifies sustainable community-focused architecture. The project demonstrates thoughtful intervention in post-disaster reconstruction, balancing functional simplicity with cultural sensitivity. Its design philosophy prioritizes essential living spaces while fostering economic and social renewal within rural communities, making it a compelling case study in contemporary Japanese rural architecture and adaptive reuse principles.