Seamless Architecture: A Quantitative Framework for Reading Contemporary Building Forms

A new research study by Ryumei Fujiki and Hiroaki Ando won Excellence Award at the Advanced Design Conference 2026. The research proposes a quantitative framework for analyzing a growing category of contemporary buildings defined by continuous architectural surfaces. Titled A Form Analysis of “Seamless Architecture”, the peer-reviewed study examines approximately 100 examples, primarily dating from 2001 to 2015, and seeks to establish a systematic vocabulary for understanding buildings in which roofs, walls, and sometimes floors are visually integrated through the use of a continuous material envelope.

Example of the 3D Curved Surface Type of "Seamless Architecture": Award- winning “Wooden Auspicious Cloud for The Emperor and Empress of Japan”
Photo credit: ©Fujiki Studio, KOU::ARC

The research is grounded in the observation that architectural form has undergone a significant shift over the past century. While much 20th-century architecture emphasized clearly differentiated components and machine-like construction, a growing number of contemporary buildings appear more organic, with continuous envelopes that blur conventional distinctions between roof, wall, and other architectural elements. The researchers identify this tendency as “Seamless Architecture” and investigate how it can be classified and measured.

Examples of "Seamless Architecture" 2001-2015
Photo credit: Indicated in the Figure

Central to the study is the introduction of the “Ridge Number,” a quantitative measure based on the number of non-differentiable points and ridges within a building’s form. In polyhedral buildings, the measure broadly corresponds to the number of edges. Ordinary opening perimeters are excluded, while significant protrusions and fixed glass screens can be counted when they contribute to the building’s overall form.

How to count Number of Ridges
Photo credit: ©Ryumei Fujiki

The study also introduces the “Curved Architecture Degree,” defined as the reciprocal of the Ridge Number. The measure provides an indication of how strongly a building is characterized by curved geometry, with values around 0.1 or higher considered indicative of predominantly curved architecture.

Using these measurements, the researchers classify Seamless Architecture into six principal types: Box, House, Polyhedral, Dome, 2D Curved Surface/Folding, and 3D Curved Surface. Polyhedral buildings account for approximately 37 percent of the surveyed examples, followed by 3D Curved Surface buildings at about 25 percent and House Type buildings at 16 percent. The two curved categories together represent roughly 36 percent of the sample, highlighting the significance of curved and continuously articulated forms in contemporary architecture.

The research further examines how seamless surfaces are constructed and perceived through three broad finishing strategies: Monolithic Integration, Tiling, and Division. These approaches demonstrate that visual continuity does not necessarily depend on a single construction technique; instead, a seamless appearance can emerge through different relationships between material, geometry, and surface articulation.

Beyond classification, the researchers position the framework as a potential tool for architectural education, design organizations, planning agencies, and further academic research. By translating formal characteristics into measurable data, the study aims to make contemporary building morphology more accessible to comparative analysis.

The authors also propose extending the research beyond form to investigate the relationships among function, structure, environmental performance, architectural components, and the whole building. In this sense, Seamless Architecture is presented not simply as a visual style but as a field for examining how contemporary buildings challenge conventional boundaries between architectural elements.

The study offers a method for reading these buildings through measurable characteristics rather than subjective visual impressions. By establishing a shared framework for describing continuity, curvature, and formal complexity, it opens another avenue for understanding how architectural morphology is evolving in the 21st century.

The book "Seamless Architecture of Fujiki Studio + F.A.D.S 2010–2026” (published by Beam Gallery, UK, 2026, 164 pages, Paperback book, Text written in both English and Japanese, ISBN-13 978-1-0369-7430-5) would help for better understanding of Fujiki's scheme.

Ryumei Fujiki and Fujiki Studio

Ryumei (Takaaki) Fujiki completed his MA and the Doctor of Engineering at the University of Tokyo under Hiroshi Hara and Akira Fujii.

He founded Fujiki Architectural Design Studio(F.A.D.S) in 1991. He has been teaching as a professor at the School of Architecture, Kogakuin University (KOU: :ARC) , Tokyo since 2001.

He is an emeritus professor of Kogakuin University now. He has a great interest in nature especially the advanced system of nature.

He is studying on various research focuses at Fujiki Studio of Kogakuin University, specializing in environmental and experimental architecture.

Yukiko Sato and F.A.D.S

Yukiko Sato joined F.A.D.S as a design partner since 2000. She graduated from Japan Woman’s University.  She has been teaching as a part-time lecturer at Japan Women's University and four other universities since 2012. F.A.D.S has made numerous practical works in Japan.