Cover Hoshinoya Karuizawa’s lighting scheme embodies biophilic design, creating a resort that transforms through absence rather than theatrical intervention, with floating lights marking the water's surface
Hoshinoya Karuizawa’s lighting scheme embodies biophilic design, creating a resort that transforms through absence rather than theatrical intervention, with floating lights marking the water's surface
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Twenty years after opening, Rie Azuma’s Hoshinoya Karuizawa makes the case for biophilic design that defers to landscape rather than competing with it
Ninety minutes from Tokyo, Hoshinoya Karuizawa sits in a forested valley in Nagano Prefecture, with 77 pavilions scattered across the site. Architect Rie Azuma designed the resort two decades ago under a deliberate constraint: the existing landscape would dictate everything. Twenty years later, that constraint looks less like a limitation and more like the only sensible approach.
Azuma created 22 distinct pavilion types, each freestanding and connected by footpaths that wind through the property. The scattered layout costs operational efficiency (housekeeping staff cover significant distances daily), but this expense buys something conventional resort planning cannot: the sense that buildings arrived gradually over time rather than through coordinated construction.
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Above Hoshinoya Karuizawa sits in a valley carved by a river from Mount Asama, with architect Rie Azuma designing 22 different pavilion types oriented to specific site conditions
Hoshinoya Karuizawa sits in a valley carved by a river from Mount Asama, with architect Rie Azuma designing 22 different pavilion types oriented to specific site conditions
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Each pavilion opens entirely to its surroundings through terraces, a direct reference to traditional Karuizawa residential architecture. These transitional spaces handle the practical work of thermal buffering while visually extending interior space into the landscape.
Above Azuma created 22 pavilion types connected by footpaths, giving the resort the appearance of a village that settled gradually into the valley
Above The property feels more resolved now than at opening because the landscape has matured into what the design anticipated from the start
Azuma created 22 pavilion types connected by footpaths, giving the resort the appearance of a village that settled gradually into the valley
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Above Takeishi's lighting design relies on darkness, with the clear night sky providing genuine illumination that is increasingly rare in contemporary hospitality
Above The Energy In My Yard system generates 70 per cent of the resort’s power from the river and geothermal wells, achieving ten times standard heat exchange efficiency
Takeishi's lighting design relies on darkness, with the clear night sky providing genuine illumination that is increasingly rare in contemporary hospitality
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The interiors take a position on what luxury means. Azuma calibrated sofa depths and eye levels for extended occupation, then removed most standard resort amenities. No televisions, minimal technology, reduced conveniences. This will frustrate guests expecting conventional five-star accoutrements. But the design makes a specific argument: that watching weather move through a valley matters more than in-room entertainment systems, that comfort comes from calibrated furniture and natural ventilation rather than technology. After two decades of hotel rooms adding ever more features, the position feels less austere than clarifying.
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The property's network of winding paths connects pavilions while preserving the shape of the valley and its existing trails
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The 77 pavilions are divided into three room types (Mizunami, Yamaroji, and Niwaroji), each oriented differently to take advantage of specific site conditions. Materials emphasise weight and texture. Wood shows its grain and joinery. Stone stays cool and heavy. Azuma designed each room as a viewing platform that also includes sleeping and bathing facilities. When the weather turns, and you spend extended time indoors, the architecture earns its keep: the calibrated furniture, the specific window placements, the way rooms divide into zones for different activities without walls.
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Windows frame seasonal changes as primary architectural content, with rooms treating the landscape beyond as more essential than interior amenities
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Above The 77 pavilions divide into three room types (Mizunami, Yamaroji, and Niwaroji), with rooms separating sleeping from sitting through level changes rather than walls
Above Windows in guest room baths frame the forest canopy, treating bathing as an activity oriented toward landscape observation rather than privacy
The 77 pavilions divide into three room types (Mizunami, Yamaroji, and Niwaroji), with rooms separating sleeping from sitting through level changes rather than walls
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Spatial organisation separates sleeping from sitting through level changes and furniture placement. Morning light first reaches the sitting area; evening light moves to the sleeping platform. The architecture tracks solar movement passively, which means occupants follow rather than control it. This creates a particular kind of attention to natural cycles that urban life typically obscures.
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Tables and seating at Kasuke maintain low profiles to preserve valley views, allowing the river and forest to dominate the dining experience
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At the main dining pavilion, Kasuke, Azuma applied the same material discipline, using local wood to form the structure while keeping tables and seating low to preserve valley views. Service spaces recede into the background, allowing the river to dominate as the building reads as a pavilion in a forest clearing rather than an enclosed dining room.
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Above The 22 pavilion types occupy different positions in the valley, each oriented to take advantage of specific relationships with water, trees, and topography
Above Azuma designed each pavilion as a viewing platform that frames the valley and river beyond, with wood surfaces showing grain and joinery
The 22 pavilion types occupy different positions in the valley, each oriented to take advantage of specific relationships with water, trees, and topography
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Landscape architect Hiroki Hasegawa treated the valley’s century-old trees as immovable and designed everything else around them. His footpaths follow natural grades rather than imposing geometric order. The constant elevation changes require some physical ability to navigate, though for those who can, the result places you inside the forest rather than on paths cutting through it. You hear the river rise and fall with elevation and planting density, a natural soundtrack that changes with every turn. This approach (biophilic design in its purest form) rejects nature as a decorative backdrop.
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Above Pavilions open to the valley through terraces, a reference to traditional Karuizawa residential architecture that uses these spaces as thermal and visual buffers
Above The river provides both power through the Energy In My Yard system and presence as it flows through the property, its sound shifting with location
Pavilions open to the valley through terraces, a reference to traditional Karuizawa residential architecture that uses these spaces as thermal and visual buffers
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Masanobu Takeishi’s lighting design depends on darkness. At night, he withdrew artificial light to let moonlight and starlight do the work. The resort transforms after sunset, though navigating these dark paths requires adjustment for guests accustomed to urban lighting. The trade-off matters: most resorts light their grounds to eliminate any sense of actual night. Here, genuine darkness returns, and with it the possibility of seeing stars.
Above The resort reads as a village that settled gradually into the valley, with buildings and landscape integrated through two decades of natural growth
The resort reads as a village that settled gradually into the valley, with buildings and landscape integrated through two decades of natural growth
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The resort’s environmental systems operate on similar principles. Its Energy In My Yard system generates 70 per cent of the resort’s power from the river and geothermal wells tapping the local hot spring. Three wells achieve ten times the standard heat exchange efficiency, providing floor heating and natural cooling without fossil fuels. This required a significant upfront investment that most resort developments are reluctant to commit to. But two decades of operation demonstrate that biophilic design extends beyond aesthetics. Systems designed around site conditions rather than mechanical standards have proven themselves over time.
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Hasegawa treated the valley's ancient trees as immovable points and designed pathways and structures around them
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The design has aged by allowing natural processes to dominate. Trees have grown denser, and pathways have settled into the hillside, while buildings that avoid formal statements let these changes register fully. The property now feels more resolved than it did at opening because the landscape has matured into what the design anticipated, demonstrating what biophilic design accomplishes over decades rather than at completion.
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Above Hasegawa’s landscape design preserves the valley’s natural water movement, with the river and its tributaries defining circulation and spatial experience
Above The buildings avoid formal statements, allowing natural changes to dominate as the forest has grown denser around them over the past two decades
Hasegawa’s landscape design preserves the valley’s natural water movement, with the river and its tributaries defining circulation and spatial experience
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The hospitality industry currently discusses biophilic design and sustainability as recent innovations. Hoshinoya Karuizawa embedded both from the start, calling them operational requirements. The resort borders the Karuizawa National Wild Bird Sanctuary Forest, established by the current CEO’s grandfather and wild bird researcher Godo Nakanishi. Picchio, the on-site wildlife research centre, has tracked this ecosystem for three decades. Architecture, conservation, and hospitality operate as one system here, not separate departments coordinating efforts.
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Above Hiroki Hasegawa's footpaths follow natural grades and connect across the river through small bridges, creating continuously changing soundscapes
Hiroki Hasegawa's footpaths follow natural grades and connect across the river through small bridges, creating continuously changing soundscapes
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Above The 77 pavilions occupy a forested valley in Nagano Prefecture, with the design preserving the valley’s existing topography and century-old trees
The 77 pavilions occupy a forested valley in Nagano Prefecture, with the design preserving the valley’s existing topography and century-old trees
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Above Masanobu Takeishi's lighting design withdraws artificial light after sunset, allowing the pavilions to register against the forest at night
Masanobu Takeishi's lighting design withdraws artificial light after sunset, allowing the pavilions to register against the forest at night
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This approach requires patient capital, a site with inherent ecological value, and clients willing to favour design discipline over conventional amenities. Few resort developments operate under these conditions, which makes Hoshinoya Karuizawa valuable as a case study in what becomes possible when they do. Twenty years of operation confirm that biophilic design prioritising ecological context over standard guest expectations produces architecture that improves with time. The buildings have barely changed while the forest has grown around them, a relationship the design anticipated from the start. Hoshinoya Karuizawa succeeds through precision in reading a site and discipline in response, two qualities that matter more than novelty in architecture meant to last.
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Jennifer Choo is Regional Managing Editor of Tatler Homes, covering architecture, interior design, and art across Asia. Based in Malaysia, she oversees regional content on luxury residential design and contemporary art collections. Legally trained but choosing to pursue her passion for design, she previously led notable design publications and worked as an interior stylist and art consultant for property developers, design firms, and private clients.
