Abstract
This paper is a case study of the physical built up process and its implication on the inner city housing provision at Kita-Shinjuku-4-Chome in the west of central Tokyo where many small mid-rise apartments have been built by site-by-site renewal process in 1980-90s. The authors concluded that the traditional trend of increasing single households was terminated in late '80s and new trend of increasing 2 person households are emerging through the renewal of low-rise apartments to mid-rise apartments.