Harudot Khao Yai is located on a sloping site descending from the main road toward a large water basin, opening to a panoramic view of the Khao Yai landscape. The architect recognized the site’s potential not only as a café destination, but also as a public viewpoint—one that could be accessed independently by passersby without entering the café itself.
The design concept emerged from the intention to elevate the viewing platform and make the landscape accessible from outside, as if the ground surface were sliced and lifted, projecting forward toward the expansive scenery beyond. The manipulation of the terrain is inspired by Kirikami, the Japanese art of cutting and folding paper. This idea is reinterpreted architecturally, imagining the land as a single sheet that is cut, lifted, and folded to generate multiple spatial layers. These gestures define both the public realm, where visitors can pause to enjoy the view, and the more private café spaces, which open directly toward the water basin and surrounding mountains.
The architectural process begins with a “cut” into the land, followed by lifting the ground to form an artificial hill connected to the roadside. Along its edge, a stairway is introduced as a public route, allowing visitors to ascend and access the viewpoint without passing through the café. The design then “folds” horizontal planes into the earth, carving out interior spaces for the reception and café areas. A single, compressed entrance guides visitors inward, gradually revealing the site’s most expansive view. Through a sequence of folded planes, the building creates a variety of outdoor, semi-outdoor, and indoor spaces, seamlessly linking horizontal and vertical surfaces into a continuous spatial experience—from interior spaces to terraces and the rooftop, all merging with the natural landscape of Khao Yai.
Due to its dual role as both architecture and retaining structure, the building is constructed primarily from cast-in-place concrete, with surfaces left exposed to express the material honestly. In alignment with Nana Coffee Roasters’ commitment to sustainability, the project serves as a pilot for the use of low-carbon concrete, incorporating calcined clay to partially replace clinker. This approach reduces carbon dioxide emissions by up to 38%. The resulting concrete carries a natural clay-toned hue—soft, warm, and reminiscent of coffee beans. Under daylight, the surface subtly shifts toward a pinkish tone, evoking cherry blossoms in spring, a poetic reference to Haru, meaning “spring” in Japanese.
The concrete surfaces are further articulated through a combination of grooved textures and selectively chipped finishes that reveal the aggregate within, contrasted against smooth plastered walls. The café program is organized with approximately 70% outdoor space and 30% indoor space, emphasizing engagement with the landscape. Interior elements continue the language of cutting and folding: floors rise to become coffee bean displays, circular cuts extend into spiral staircases, and washed stone surfaces fold upward to form long counters. These elements reinforce a cohesive architectural narrative, where material, surface, and function emerge from the same act of cutting, folding, and lifting the ground—creating an architecture that connects people, place, and experience into a single spatial story.