Abstract
Contemporary Japan has huge space resources. Not limited to housing. It is almost half a century since we started
building a new building with unprecedented momentum. As its result, the amount of buildings that everyone can use is
huge. Looking at the number of housing units per capita for example, there are 0.48 housing units per capita in Japan.
(2013) This far exceeds 0.43 in USA in the same year. If there is a problem unique to this huge space resources country, it
will be how much such space resources can be used as places for people's rich living. In this paper, three advanced
approaches to the use of space resources are introduced.
