This study aims to clarify the area, period and location of the Arable Land Improvement Project Areas in Urbanization Promotion Areas (ALIPA/UPA) of Aichi Prefecture in which infrastructure improvements were most intensively implemented in Japan. Main findings are as follows; (1) The ALIPA/UPA is 7,085ha in whole area of the prefecture. More than seventy percent of UPA in area was developed by ALIP on northwest part of Aichi Prefecture. Most of ALIPA/UPA can be seen in northwest part of Aichi Prefecture, particularly in neighboring local bodies on Nagoya City. Low land spreads on the area. (2) In 1960's before the promulgation of City Planning Law, it had been intensively implemented without subsidy of national government in order to realize free standards of roads as housing lands.
