The project "Mille-feuille of dwellings" seeks to reimagine the habitat (sumi-ka) by integrating layers of earth, vegetation, animal dwellings, and human housing into a unified system. Set in the Osaka Gas experimental housing complex NEXT21, the proposal uses the skeleton-infill structure to gradually accumulate architectural layers as temporal and spatial strata. Over a 30-year timeline, it challenges conventional urban collective housing and superficial greening architecture by proposing a truly symbiotic relationship between nature and humanity.
The architecture evolves over time, alternating layers of housing and natural folds with 5-year assimilation phases. Housing units grow vertically, introducing diverse spatial forms like semi-underground spaces, vertical streets, and cave-like rooms. Human activities—such as renovation, harvesting, and pruning—create “gaps” that stimulate ecological growth. Thus, the project operates across multiple scales, from individual dwellings to ecological systems, emphasizing a dynamic and integrated habitat.
The structure uses the skeleton-infill system, allowing for adaptable modifications and future layering. Each stratum features a unique planting scheme based on research into local species, integrating diverse trees, crops, and herbs. The environmental system includes underground water circulation and wind flow paths, incorporating nature’s dynamics into the infrastructure. The layering of earth and housing creates varied microclimates across floors, enabling living spaces that evolve with the residents’ lifestyles and community engagement.