HafH Nagasaki SAI is a contemporary residential and commercial complex completed in 2019, designed by architect Momoe Yu. Located in the historic Furukawa district of Nagasaki, this multi-purpose facility skillfully integrates dormitory accommodation, lodging facilities, and commercial spaces within a single architectural composition. The building represents modern approaches to mixed-use urban development while respecting its location's cultural context. With its thoughtful design and functional versatility, HafH Nagasaki SAI serves as an exemplary model for sustainable community spaces that balance residential comfort, hospitality services, and commercial vitality in contemporary Japanese architecture.