Abstract
This paper analyses two elements of a rent on economic theory. The one is ground rent, and the other is depreciation. The conclusions are as follows. 1. In Japanese, there are many managers who manage the tenement-houses on their own lands. They are possible to manage the tenement-houses without keeping ground rent. So, it is difficult for them to be concious of ground rent. 2. About depreciation of building value, many managers are not concious of depreciation reserve. Because, many of them don't want to keep management of tenement-house repeatedly.
