自六十年代以来日本利用放射性同位素与辐射的厂商与公司逐步增加。1970年时日本已建立起应用示踪剂和辐射源的工艺技术。一些高质量的有关仪器装置开始供应市场。七十年代日本放射性同位素的与辐射的应用单位迅速增多。至1981年财政年度末,应用单位数目达4,000;1983年财政年度末这一数目增长到4,354。日本现有1,725家民间公司应用放射性同位素与辐射技术。应用同位素和辐射的研 Japan’s use of radioisotopes and radiation has gradually increased since the 1960s. In 1970, Japan had established a process technology using tracers and radiation sources. Some high quality related instrument devices began to supply the market. In the 1970s, the number of radioisotopes and radiation applications in Japan increased rapidly. By the end of the financial year 1981, the number of units used had reached 4,000; at the end of the fiscal year 1983 this number had grown to 4,354. There are 1,725 ​​private companies in Japan that use radioisotope and radiation technology. Application of Isotope and Radiation Research