This project set out to complete a high-end villa in a time- and cost-effective manner by combining modular 2.5-by-6-meter steel units.

The site lies on an inclined plot at the southernmost point of Minamiboso City , with an unobstructed view of the Pacific Ocean. To keep earthworks to a minimum, the design adopted a split-level arrangement that responds to the natural topography, placing two detached wings at ground level with the main residence above. In the main residence, the bedrooms and service spaces are grouped in an L-shape to the northeast side, with the south-facing living area featuring full-height openings to maximize the ocean view.

The terrace’s roughly five-meter-deep overhang creates a generous semi-outdoor area. At the same time, the side walls narrow the sightlines from inside, screening out the east–west road in front and making it feel as though nothing but the ocean lies ahead.

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A Fast, Cost-Effective Modular System

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For villas designed in remote locations to provide a sense of escape from daily life, chronic shortages of skilled artisans regularly result in longer project timelines and higher costs. Since this property was planned as a vacation rental, increases in upfront costs would directly impact the project’s financial viability, and a longer construction schedule would inevitably postpone the return on investment.

To address this, the project attempted a modular form of ‘container architecture,’ creating the building’s framework by joining fourteen 20-foot shipping containers that had been preassembled off-site in a factory. By securing the container units to foundation anchors and limiting assembly work to bolted joints, welding, and waterproofing between units, the structure was erected within a single day, enabling completion of the more than 400-square-meter building in only three months from start to finish.

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Post Prefablication-From Convenience to Luxury-

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Modularization enables a shorter construction period. Corrugated steel panels, commonly used in shipping containers, are also a rational material choice, providing rigidity while reducing structural weight. Yet because containers are broadly associated with warehouses and storage, their corrugated steel surfaces carry an industrial image that can feel at odds with the luxury expected of a villa.

The design, therefore, sought to abstract the structural elements by using white consistently throughout the flooring, walls, and ceiling. While creating a variety of textures by combining different materials, the white palette visually unifies these differences and softens the industrial character of the corrugated steel panels. The white surfaces also help to carry light into the depths of the interior beneath the deep overhangs, while highlighting the blue of the sea and sky and the green of the surrounding trees, ultimately bringing out the full value of the environment.

 By converting the utilitarian image stemming from the efficiency of container construction into a sense of luxury through the abstraction of its components, this proposal could serve as a prototype not just for villas but for modern housing as a whole.

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