This study forcuses on the transformation of dwelling units in Dojunkwai Daikan-yama Apartment House which was built by the Dojunkwai Foundation in 1927. The aim of this study is to find out changes in fanctions of dwelling units and the way of transformation of all dwelling units. Analisys was taken under 3 ponts of view, "change of people", "multi-unit use" and "change of space use". Findings are as follows; Low rise buildings have a tendency to afford long-term dwelling. Multi-unit dwelling can easily suit each dweller's life cycle. Changes of space use occur according to transformations of neighborhood circumstances.
