In Japan, there are three big city areas. They are Tokyo, Osaka and Nagoya areas. The population of Tokyo area is 34 million, Osaka area is 18 million, and Nagoya area is 11 million. These total of population is about half of Japan. In Japan, almost all houses are single family homes. However the number of rooms in a house is not large.
Since in this situation, the Jpanese typically focus on the quality of lifestyle in order to make up for the small rooms. They decorate their rooms with some traditional decoration to make the rooms warm and sweet. When they finish works and go back home, they can rest in their rooms which are quiet but lovely at the same time.