During the 1960s there were also architects who did not see the world of architecture in terms of Metabolism. For example, Kazuo Shinohara specialised in small residential projects in which he explored traditional architecture with simple elements in terms of space, abstraction and symbolism. In the Umbrella House (1961) he explored the spatial relationship between the "doma" (earth-paved internal floor) and the raised tatami floor in the living room and sleeping room. This relationship was explored further with the House with an Earthen floor (1963) where a tamped-down earthen floor was included in the kitchen area. His use of a roof to anchor his design for the House in White (1966) has been compared with Frank Lloyd Wright's Prairie Houses. Shinohara explored these abstractions as "Three Styles", which were periods of design that stretched from the early sixties to the mid seventies.