大阪市的缺点是位于软弱低洼的沉积地。而且,城市中有高密度的大量木结构房屋,还没足够数量的空旷地带以利于灾害预防。这种环境的综合就造成容易受灾害的一座城市。为此,不仅迫切需要有预防地震引起的主要破坏对策,而且要有预防火灾引起的次生破坏的对策。所以 The disadvantage of Osaka is that it is located in a weak, low-lying sediment. Moreover, the city has a large number of high-density wooden houses, not enough open areas to facilitate disaster prevention. The combination of these environments creates a vulnerable city. For this reason, there is an urgent need not only for preventing major damage caused by earthquakes, but also for preventing secondary damage caused by fire. and so