World Architecture Festival
Some of Japan's most innovative and forward-looking buildings draw on traditions blurring the line between nature and architecture.

Set midway on a hill in Hiroshima, this chapel designed by Japanese architect Hiroshi Nakamura spirals up toward the sky, while hugging the surrounding environment.
Courtesy Koji Fujii/Nacasa and Partners Inc
Primarily a wedding chapel, the building's two spiral staircases entwine to personify the act of marriage. "Instead of designing something preconceived in the architect's mind or the designers mind, it's important to emphasize what nature has to offer," Nakamura tells CNN.
Courtesy Koji Fujii/Nacasa and Partners Inc
This house in downtown Hiroshima uses a glass facade to draw attention to natural phenomena such as light, wind and rain.

"You see the light coming through the façade, filtering through the optical glass to create the light patterns on the wall," explains Nakamura.
Courtesy Koji Fujii/Nacasa and Partners Inc
In front of the glass is an indoor garden visible from every room in the house. Light dances through the trees into the living room, and a water-basin skylight creates water patterns on the entrance floor when it rains.

"The architecture emphasizes the natural phenomenon so people can feel that they're part of nature," he says.
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Sou Fujimoto breathes nature into his designs. This house in central Tokyo represents a single tree, with many branches.
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Even in dense urban areas, Japanese architecture sits in harmony with the built environment, as exampled in Fujimoto's projects.
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This house designed by Sou Fujimoto mirrors that of a porous mountain. Large trees dwarf small minimalist blocks. Fujimoto has said, "It is a really fundamental question -- how architecture is different from nature, or how architecture could be part of nature."
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House N, designed by Sou Fujimoto, resembles being in the clouds. There is no distinct boundary between the street and the inside of the house.
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Fujimoto's Polytechnique University, which will be built in Paris, lets nature and light invade the building.
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This project by Sou Fujimoto in collaboration with Manal Rachdi- OXO Architects, called "Thousand Trees," transforms the skyline of Paris with exactly that -- a residential building covered in 1,000 trees, adding a layer of protection against air pollution.
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Sou Fujimoto designed this building, located in the back alleys of Omotesando in Tokyo, to create a new fusion between the built environment and nature. Trees are placed on the end of the concrete frame, to make it appear as if real trees are sprouting out of an artificial one.
Photo by Tomio Ohashi
One of Toyo Ito's masterpieces, this library employs structural tubes resembling tree trunks in place of walls. It's built to withstand the shock of powerful earthquakes. Ito has said that "all architecture is an extension of nature."
Rendering by kuramochi+oguma
Ito's Taiwan opera house incorporates the surrounding park and landscape into its structure.
Courtesy Koji Fujii/Nacasa and Partners Inc
The upper walls of this chapel in Japan's Saitama prefecture lean inward in order to avoid the tree branches, forming an upside-down "V" structure called "Gassho-zukuri." This structural form is similar to the shape made by two hands while in prayer.
Courtesy Koji Fujii/Nacasa and Partners Inc
The multi-religious chapel has a small altar looking out to the forest beyond. The altar and benches can move to accommodate all faiths, as well as those looking for a place to reflect.

"Traditionally in Japanese culture people have this mindset of becoming part of nature," explains Nakamura.

Editor’s Note: This feature is part of Vision Japan, a series about the visionaries who are changing Japan, and the places that inspire this innovation. See more here.

Story highlights

Cutting-edge Japanese architecture is drawing on nature for inspiration

Buildings are built around trees, in trees and as trees

Japan's culture of resilience is built into its architectural practice

CNN  — 

In Japan, the line between nature and the built environment is a blurred one and the country’s leading architects are using this concept to create innovative and cutting-edge designs.

Sou Fujimoto is at the forefront of Japan’s forward-thinking design and is known for integrating nature into his work. His designs include cloud-like structures like the futuristic Serpentine Pavilion, in London, and a glass, transparent house in Tokyo inspired by the life of a tree.

Another celebrated architect, Toyo Ito has twice won the prestigious Pritzker Prize, and it’s no coincidence that some of his most inventive works are designed to be experienced like forests.

His Mikimoto Ginza, Tod’s Omotesando and Sendai Mediatheque incorporate tree-like elements, and light falls into the buildings like it would a forest.

Nature in buildings

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This house designed by Sou Fujimoto mirrors a porous mountain. Large trees dwarf small minimalist blocks.

While the designs are forward-looking, they have their origins in a tradition deeply rooted in Japanese culture, where architectural practice has always been to work in harmony with the natural surroundings. Buildings are built around trees, in trees and as trees.

It’s difficult to know when this philosophy began. It has “always been there,” says Neil Jackson, an expert on Japanese architecture from the University of Liverpool in London.

However, one clue can be found in the Japanese writing system. Put together the pictogram (Kanji) for “house”, and the pictogram for “garden,” and you get “home.” The space inside and outside the building is continuous.

The source of this approach is, in many ways, a result of Japan’s mountainous landscape and exposure to extreme weather events, like earthquakes, which thrusts nature to forefront of daily life. As such, the country has limited spaces for living, with most of the population on the coast.

“People’s relationship to nature is very immediate. People are very crammed in,” Jackson explains.

In some cases, traditional rural buildings can be opened entirely to the surroundings. “Japanese buildings often don’t have doors. When the weather is very hot, especially in poorer communities in Japan, they would just open up the entire building. Nature flows through the living space,” Jackson says.

Finding nature in cities

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The Polytechnique University by Sou Fujimoto lets nature and light invade the building.

In contemporary Japan, over 90% of the population lives in urban areas. But even in the country’s dense, futuristic concrete jungles the relationship to nature exists.

“Japanese urban living is quite tight and condensed,” says Jackson. “Yet within these very tight plots you get extraordinary open situations almost as if there’s no container, or containment, at all.”

Resilient architecture

The relationship between nature and buildings is also about survival. Buildings can be very lightweight, raised above the ground and flexible to twist and absorb the shock of an earthquake.

Ito’s acclaimed Sendai Mediatheque building, in Miyagi, survived the devastating quake of March 2011, in part because of the innovative use of tree-like flexible supporting tubes within the building.

Jackson comments: “There’s a huge ability in Japanese culture to survive disasters.”

Tadao Ando is a self-taught architect highly regarded for his contribution to modern Japanese architecture. He creates mostly concrete, sculptural buildings that focus on the flow of natural light.

Jackson explains: “His work, despite using concrete, reflects that same fizzling of nature and building. Nature is also caves and spaces within the land.”

© Shigeo Ogawa
The Center for Arts, Architecture and Design in Monterrey, Mexico, by Tadao Ando.

Japan’s culture of resilience is built into its architectural practice, and its ideas about openness translate to even the most modern forms of urban living.

In Japanese thinking there is no built or natural environment – just nature.