In section and in plan, Seaside Boomerang, a weekend villa in Isumi, Japan reflects its namesake form. The pitched roof acknowledges the sloping hills of the site, and the obtuse angle of the building opens toward the beautiful shoreline of Chiba. Designed by Atelier Haretoke, Seaside Boomerang sits on stilts, an engineering necessity in light of the sandy foundation, yet the vertical supports are also a motif for the window mullions of the two-storey glazing that visually connects the beach with the villa’s interior. Similarly, the external terrace has a counterpart within the villa: a catwalk that leads to an upstairs loft and private bedroom. By pushing program into the ends of the boomerang shape, Atelier Haretoke creates a focus on freeness of space that rivals the open sea.