How Luxury Hospitality Understands Place

The case of Not A Hotel Setouchi and what rammed earth proves about architectural identity..

An Island That Became a Building

On April 1, 2026, three rammed-earth villas opened to their owners on Sagishima Island, a remote landmass in the Seto Inland Sea, in Hiroshima Prefecture, Japan. The buildings are the first completed works in Japan by Bjarke Ingels Group, the Copenhagen-founded studio that has spent three decades working at the intersection of ambition and material precision. Their client is Not A Hotel, a Japanese hospitality company whose model has always resisted the logic of conventional ownership. The villas are named 360, 270, and 180, according to the degrees of panoramic view each provides of the surrounding sea.

The walls of these buildings are made from the ground they stand on. The soil was excavated during construction and compacted using the rammed earth technique -- an ancient method that creates load-bearing walls of compressed earth, typically between 45 and 60 centimetres thick, with thermal and acoustic properties that no synthetic system accurately replicates. The earth is not a cladding applied to a frame. It is the structural argument of the building. This distinction matters enormously: it is the difference between material as surface and material as position.

Native grasses were harvested before construction and reintroduced afterward, alongside olive trees, lemon trees, and indigenous vegetation. The project does not merely use the site's soil. It restores the site's ecology. That circularity -- of material, of growth, of consequence -- is the deepest form of design literacy a building can demonstrate.

The Scandinavian-Japanese Synthesis

Bjarke Ingels described his relationship with Japan as one of cultural recognition rather than cultural distance. The architectural principles that Scandinavia and Japan share -- honesty of structure, economy of means, precision of proportion, an understanding that material truth is a form of beauty -- make the dialogue between the two traditions one of the most productively demanding in contemporary architecture.

At Setouchi, BIG translated this through specific material and spatial decisions. Glass facades dissolve the boundary between interior and exterior in the manner of shoji screens. Black slate floors from Genshoseki natural stone reference the geometry of tatami mats. The open-plan living areas organize functional volumes -- bathrooms, storage -- as separate pods, with skylights above them that allow natural light to read through the full spatial depth of the villa. The architecture is organized not around rooms but around views: each pavilion is oriented to its exact angle of sea and hillside, and the rammed earth spinal wall defines the boundary between the outward-facing living space and the inward-facing private courtyard.

Ingels described the villas as "architectural oxymorons" -- traditional and modern, integrated and outstanding, Scandinavian and Japanese. That framing is more precise than it might initially appear. The oxymoron is not a paradox that cancels itself. It is a tension held in productive suspension. The buildings are genuinely of the island and genuinely of a studio that has never stopped being Scandinavian. That simultaneous rootedness and translocality is a design achievement very few projects manage.

What Rammed Earth Is Doing in 2026

Not A Hotel Setouchi is not an isolated event. It opens at a moment when rammed earth has moved decisively from vernacular inspiration to serious architectural material across a range of project types, geographies, and scales.

In Paris, Dechelette Architecture has completed the first self-supporting raw earth facade on a four-storey French residential building, demonstrating a carbon footprint reduction from 250 kgCO2eq per cubic metre for concrete to 23 kgCO2eq for rammed earth. In Jordan, Niall McLaughlin is designing the Museum of Jesus's Baptism in rammed earth and local stone. In Wiltshire, England, Tuckey Design Studio has completed an unstabilised rammed earth country house, working without added cement -- a decision driven by the conviction that the material must be allowed to return to the earth at the end of its life. In the Gulf, Adjaye Associates and Snohetta have each incorporated large-scale rammed earth walls into high-profile institutional and cultural projects.

The logic driving this revival is not primarily about carbon accounting, though the numbers are striking. It is about what rammed earth communicates. A wall made from the site's own geology, compressed by hand and machine over days and weeks, carries a record of its making that no industrially produced surface can replicate. The stratifications are geological; they are time made visible. That is the quality that no amount of premium finish can purchase, and it is precisely why the most architecturally serious luxury projects of this moment are turning toward it.

Not A Hotel and the New Grammar of Ownership

The building is one argument. The ownership model is another. Not A Hotel operates through fractional ownership: buyers purchase the right to use their allotted nights across the company's network of luxury vacation homes across Japan. An ownership share at Setouchi can be traded for nights at other properties in the Not A Hotel portfolio, which includes projects by Jean Nouvel at Yakushima Island and Zaha Hadid Architects at a stepped coastal retreat in Okinawa. The model dissolves the conventional logic of property as a fixed address and reconceives it as a network of architectural experiences, each designed by a studio of international standing.

This is commercially significant in ways that go beyond the hospitality sector. For the developers and architects who work with high-net-worth clients, the fractional ownership model represents a new kind of brief: the space must hold its value not as real estate but as an architectural proposition that justifies return. A property that is merely beautiful will not sustain the model. A property that is irreducibly of its site -- that cannot be replicated elsewhere, because its walls were made from where it stands -- carries the kind of singular identity that the model demands. Rammed earth, at Setouchi, is not an aesthetic choice. It is a business logic. The two are the same argument.

The access infrastructure reinforces this. Sagishima Island is reached by private boat or helicopter provided by Not A Hotel. The remoteness is not a deficiency to be overcome. It is the property's defining quality. The effort of arrival becomes part of the experience of the place. That recalibration of access as value, rather than access as convenience, is one of the more quietly radical things the luxury hospitality market is currently doing.

The Material Claim

What Not A Hotel Setouchi ultimately demonstrates is something that the most thoughtful architects and clients have always known but that the market rarely formalizes: the decision about what to build with is a design decision of the same order as the decision about form. When Ingels chose to build from the island's own soil, the building stopped being a project placed on a site and became an event within a site. The distinction is between a building that visits and a building that belongs.

That sense of belonging -- of a space that could only be itself, in this place, with this material, made at this moment -- is what the most demanding luxury clients are now seeking and what the most serious architecture is offering. The rammed earth wall is not an amenity. It is a form of credibility. It is the building's proof that someone thought about where they were.

For spaces at the level EFC Studio works with, this is the relevant question for every material decision, every spatial choice, every object in a room. Is this here because it belongs here, or is it here because it is beautiful? The greatest rooms achieve both. Not A Hotel Setouchi, on a remote island in the Seto Inland Sea, has achieved both. The earth knows its place. The building does too.

"Traditional and modern, integrated and outstanding, Scandinavian and Japanese -- the villas are architectural oxymorons embodying seemingly contradictory elements into a holistic hospitable whole." - Bjarke Ingels, Founder and Creative Director, BIG

EFC Studio

What We Believe About This Moment

What Not A Hotel Setouchi demonstrates, with unusual clarity, is that the decision about material is a philosophical decision before it is an aesthetic one. When Bjarke Ingels and his team chose to make the load-bearing walls of these villas from the island's own soil, they committed to a position: that the building's integrity would come from its relationship to its place, not from its relationship to any catalogue of approved finishes. That commitment changes everything that follows. The proportions, the views, the quality of light on the curved earthen wall -- all of it is made possible by the first decision, the one about where the material comes from. EFC Group has always believed this is how exceptional spaces are built: not from the outside in, with materials and objects added to a completed frame, but from the ground up, with every element earning its place through an argument about what belongs here.

The Not A Hotel model adds a dimension to this that is worth understanding carefully. The fractional ownership structure means that the architectural proposition must be strong enough to justify return -- to bring its owners back not out of obligation but out of genuine desire for the specific experience the place offers. That is an extraordinarily high standard for a building to meet. It means the architecture cannot be merely impressive; it must be irreplaceable. The rammed earth walls of Setouchi are irreplaceable by definition: they are made from the soil of a specific island, at a specific time, in a specific climate. No other property in the network will ever share their material identity. That singularity is the ownership model's deepest asset, and the architecture's finest achievement.

For EFC Studio and the clients we work with, this is the question every significant design decision should be answerable to: does this belong here, or is it merely excellent? The two categories are not the same. Excellence can be sourced from anywhere. Belonging requires knowledge -- of the site, of the material, of the cultural and physical context that makes this place different from every other. When Ella Fontanals-Cisneros built the spaces she built and assembled the collection she assembled, the consistency was never stylistic. It was curatorial: a point of view exercised over time, in specific places, with material and objects that carry genuine history. That is the standard Not A Hotel Setouchi holds itself to, and the standard this moment in architecture is demanding.

EXECUTIVE SUMMARY

Not A Hotel Setouchi, designed by Bjarke Ingels Group and opened to fractional owners on April 1, 2026, marks BIG's first completed buildings in Japan -- three rammed-earth villas on the remote island of Sagishima in the Seto Inland Sea, organized around panoramic views of 360, 270, and 180 degrees. The walls are made from soil excavated on-site, making each building structurally inseparable from its landscape. The project arrives during a decisive revival of earthen construction across luxury, cultural, and residential architecture globally, with rammed earth demonstrating a tenfold reduction in embodied carbon versus concrete while producing a spatial quality that no industrial material replicates. Not A Hotel's fractional ownership model -- which allows owners to trade nights across a network of architect-designed properties including projects by Jean Nouvel and Zaha Hadid Architects -- adds a commercial dimension to the architectural argument: a property must be irreplaceable, not merely excellent, to sustain its proposition. For EFC Group and its clients, Not A Hotel Setouchi is the clearest current example of what it looks like when material conviction, site intelligence, and ownership logic converge into a single architectural position.