Kengo Kuma & Associates, in collaboration with Cornelius Vöge, Søren Jensen, and Vilhelm Lauritzen Architects, has finalized the KAI Water Culture House on Copenhagen’s Paper Island. The 5,800-square-meter facility, defined by five pyramidal brick towers and ten distinct pools, is scheduled to open to the public on December 5, 2026.
Engineering the Brick Pyramids of Papirøen
The architectural language of KAI relies on a complex masonry strategy that departs from standard monolithic construction.
The pyramidal forms are not merely aesthetic choices. As reported by Dezeen, the silhouette of the bathhouse is designed to echo the residential buildings nearby, creating a cohesive urban dialogue on Paper Island. The tallest tower is designated as the Culture Tower, intended to host movement and social activities, thereby extending the facility’s utility beyond its aquatic program.
Balancing Daylight and Structural Density
The architects incorporated deliberate openings in the brickwork, a technique that the Danish Architecture Center correlates to komorebi—the Japanese concept of sunlight filtering through leaves.
The programmatic layout is equally segmented: the ground floor houses a 25-meter lap pool, a teaching pool, and three children’s play areas, while the upper levels feature an outdoor “Valley Pool” situated between the towers. A heated onsen is positioned to overlook the harbor, forcing a physical connection between the indoor wellness environment and the external Copenhagen landscape.
Evolution of the Public Infrastructure Competition
The realization of KAI represents the culmination of a decade-long development cycle. The project trace dates back to a 2015 public ideas competition, where 160 submissions were evaluated for the site. The winning proposal by Kuma, Cornelius Vöge, and Søren Jensen emerged from a mandate to create everyday public infrastructure rather than a purely monumental landmark.
| Feature | Specification |
|---|---|
| Total Area | 5,800 square meters |
| Brick Count | ~300,000 handmade units |
| Pool Count | 10 (indoor and outdoor) |
| Opening Date | December 5, 2026 |
The project extends its reach beyond those who pay for pool access. A public timber deck and harbor bath are planned for the exterior, though these specific facilities are currently slated for completion in early 2027. By integrating these public-facing edges, the architects have ensured that the structure remains a functional participant in the city’s life even for non-swimmers.
Broader Architectural Context in Copenhagen
KAI sits in a high-density zone near the Copenhagen Opera House and the newly developed Opera Park. By utilizing four brick volumes that follow the footprints of the pools below, the architects have successfully avoided the “undifferentiated hall” syndrome common in large-scale aquatic centers. Each pool area retains its own spatial identity, defined by the geometry of the tower above it.
With the official opening date set for early next month, the facility will transition from an active construction site to a public-facing entity, marking the end of the long-term planning phase that began in 2015.
