Hiiragi’s House is a minimal residence located in Ehime, Japan, designed by Takashi Okuno & Associates. The home features a U-shape configuration that surrounds a courtyard, providing natural light and airflow throughout the space. The home is finished using diatomaceous earth and marble powder, as well as solid wood and cellulose fiber for thermal insulation. The main living area features double-height ceilings to promote transparency between the ground floor and upper level.