For more than 15 years, architects Kazuyo Sejima and Ryue Nishizawa have worked together in their collaborative partnership, SANAA, where it is virtually impossible to untangle which individual is responsible for what aspect of a particular project. Each building is ultimately a work that comes from the union of their two minds. Together they have produced major commissions, such as the O-Museum in Nagano and the 21st Century Museum of Contemporary Art in Kanazawa (both in Japan), the Glass Pavilion at the Toledo Museum (Ohio), De Kunstline Theater and Cultural Center (Almere, the Netherlands), the New Museum of Contemporary Art (New York, NY), and the recent Rolex Learning Center (Lausanne, Switzerland).

The buildings by Sejima and Nishizawa seem deceptively simple. The architects hold a vision of a building as a seamless whole, where the physical presence retreats and forms a sensuous background for people, objects, activities, and landscapes. They explore like few others the phenomenal properties of continuous space, lightness, transparency, and materiality to create a subtle synthesis. Sejima and Nishizawa’s architecture stands in direct contrast with the bombastic and rhetorical. Instead, they seek the essential qualities of architecture that result in a much-appreciated straightforwardness, economy of means, and restraint in their work.

This economy of means, however, does not become a simple reductive operation in the architects’ hands. Instead, it is an intense and rigorous investigation anchored in hard work and steely determination. It is a constant process of refinement, where each client’s program is fully investigated and multiple design possibilities are explored through numerous drawings and models that check every alternative. Ideas are considered and discarded, reconsidered and reworked until only the essential qualities of a design remain. The result is a deft union of structure and organization, of logical purpose and precise beauty.

It may be tempting to view Sejima and Nishizawa’s refined compositions of lightness and transparency as elitist or rarefied. Their aesthetic, however, is one of inclusion. Their approach is fresh, always offering new possibilities within the normal constraints of an architectural project as it systematically takes the next step. They use common, everyday materials while remaining attuned to the possibilities of contemporary technology; their understanding of space does not reproduce conventional models. They often opt for non-hierarchical spaces, or in their own words, the “equivalence of spaces,” creating unpretentious, democratic buildings according to the task and budget at hand. One example is the Almere project in the Netherlands, with its many simple classrooms and workshops, all presenting privileged views of the sea. Another example is the Rolex Learning Centre in Lausanne, a space to be used by students day and night. Sejima and Nishizawa originally conceived it as a multi-story building, but, in the course of their deliberation, it became a single yet vast, flowing space. The building’s many spaces (library, restaurant, exhibition areas, offices, etc.) are differentiated not by walls but by undulations of a continuous floor, which rises and falls to accommodate the different uses, while allowing vistas across this internal “landscape for people.”