Abstract
Contents: 1) Tracing the income-rent function by type of difficulty to pay the housingrent, according to the results of housing survey in 1955 and 1960. 2) A group of housing expenditure function by type of difficulty could be obtaind, when the degree of difficulty is fixed to some optional level. 3) Thus a group of Income-rent functon which covers all range of income class have been obtained.
