1986 年 21 巻 p. 277-282
Chiyoda-ku which is included in the C.B.D. of Tokyo can divided into SHITAMACHI (the business and commercial area) and YAMANOTE (the residential area). In SHITAMACHI the old residents who do business on their own account for a long time and have land and house of their own, expand their residential space and create the rental office floor through rebuilding. On the other hand, the old residents who are leaseholders or tenants are made to outmigrate by trading leasehold between landowner and developer. In YAMANOTE condominiums are supplied by the equivalent exchange system of real estate in many cases, and that brings about the population increase.