Japanese architecture is also characterised by large, imposing roofs. This is because a Japanese building's horizontal axis and low profile make the roof the only indicator of its presence. Although crowning imposing buildings with suitably impressive roofs is widespread across Asia, the trend developed in Japan not because of climate (high temperatures and humidity) but to represent a building's existence symbolically.
Japanese dwellings were basically single-storey until the mid-19th century, when the influence of Western architecture saw Japanese start to live in two-storey and taller houses. This change also spurred architects to emphasize facades. The modern architectural movement in early-20th century Europe turned a new spotlight on Japanese architecture and its horizontal focus. European architecture had traditionally stressed the vertical axis through facades, but modernism marked the beginning of a twin vertical/horizontal development. Japan's horizontal axis was an awakening for the West.
The world thus rediscovered traditional Japanese architecture and its horizontal axis. One of the 20th century's most significant architects, Kenzo Tange (1913-2005), combined traditional Japanese architecture with modernism, using a traditional composition of columns and beams as if creating an abstract painting. His designs brought Japanese architecture's aversion to room divisions directly into modern architecture. Successors such as Fumihiko Maki, Arata Isozaki, Kisho Kurokawa and Yoshio Taniguchi designed buildings using horizontal and vertical axes as simple geometrical structural elements, thus fusing traditional Japanese with modern architecture. Today the succeeding generation of Toyo Ito and Tadao Ando continues to take Japanese architecture in new directions.