Hayama no Kooya, completed in 2010 and designed by Kazuyo Sejima's architecture office, is a residential project located in Hayama, Kanagawa Prefecture. This intimate dwelling exemplifies contemporary Japanese residential design through its refined spatial composition and minimalist aesthetic. Sejima's approach emphasizes the relationship between interior and exterior spaces, creating a serene retreat that harmonizes with its natural surroundings. The project demonstrates her signature attention to light, materiality, and proportion, making it a notable example of early 2010s Japanese domestic architecture for those interested in modern residential design principles.