Tato Architects' Mibu Timber House: A Harmonious Blend of Nature and Architecture



















In Mibu, Tochigi Prefecture, Japan, Tato Architects has completed a striking two-story timber residence for a family of five. This innovative dwelling is strategically positioned within the backyard of the family’s ancestral home. A notable feature is its living floor, intentionally lowered by approximately 500 millimeters into the ground, crowned by a green roof that effectively extends the surrounding garden space over the entire structure.
The architectural design thoughtfully considers the existing environment, particularly a large, aged barn used for parking and work. To preserve the open character of the garden, the house is subtly rotated to align with the passage of vehicles, carving out protected zones where the roofline approaches the barn and creating open areas where it recedes. This strategic placement not only respects the site's history but also fosters dynamic spatial relationships.
A key element of the home is its half-sunken living area, nestled by the earth and a low timber ceiling, yet opening expansively towards the garden. This lowered perspective allows the garden to appear at eye level through the glass, forging an intimate connection with nature. Upstairs, a more secluded arrangement of nest-like rooms is connected by two staircases, leading to a raised loft area that serves both as a workspace and a sleeping quarter. This thoughtful interplay of levels establishes visual connections among family members, whether they are in the garden or inside the living room, extending the firm's signature split-level design philosophy to encompass the broader relationship between the residence and its natural surroundings.
The house's design masterfully integrates with its context through material choices and a conceptual roof. Clad in charred cedar, known as yakisugi, beneath a corrugated galvanized steel roof, the exterior presents a resilient yet organic aesthetic. Inside, lauan plywood complements troweled mortar floors, offering a warm and inviting atmosphere. By submerging the living space and allowing the garden to flow across the roof, the architecture transcends conventional boundaries, creating a unified and enriching living experience that beautifully merges with the existing backyard and barn, evoking Aldo van Eyck's concept of an 'in-between' space where enclosure and openness coexist. This thoughtful integration of built form and natural landscape culminates in a dwelling that is both a sanctuary and a celebration of its environment, fostering a deep and meaningful connection between residents and their surroundings.