This paper is written about the relations between city planning and disaster prevention planning on five cases of destructive city fire -lida in 1947, Noshiro in 1949 and 1956, Tottori in 1952, Niigata in 1950- after World War II. It was cleared about following 3 aspects. 1 Relations between city planning and disaster prevention were changed for that dozen years. The planning theory of that term changed "Park, Parkways and Boulevard System". 2 Characteristics about city planning and disaster prevention planning were similar each other. 3 Speed and difficulty of land readjustments were different each other. Those cases show that regionality has effects on the operation process of city planning rather than planning process of city planning.
