混凝土在日本战后的复兴事业中占有重要地位,混凝土工业的规模和日本整个工业一样,在世界资本主义国家中名列第二,仅次于美国。如果考虑到日本有1亿2千万人口,但国土却只是几个岛,而且四分之三的土地是山林地区,自然资源极为贫乏,几乎 Concrete plays an important role in Japan’s postwar post-war rehabilitation. The size of the concrete industry ranks second in the world’s capitalist countries, behind Japan, just like the entire industry in Japan. If one considers that there are 120 million people in Japan, but the country is only a few islands, and three-quarters of the land is in a forested area, and the natural resources are extremely poor.