日本无稀土资源,主要靠进口原料,自行提炼后使用。其中原料独居石,因含放射性元素钍,对人体有危害,现已禁止进口。从而增加了氟碳铈矿和不含钍的氯化稀土以及其他中间产品的进口。日本生产稀土氧化物的单位大小共有九家,其中主要有日本钇公司、获野化学研究所、三德金属工业公司等三家。 No rare earth resources in Japan, mainly by importing raw materials, used after refining. One of the raw materials monazite, thorium containing radioactive elements, harmful to humans, is now banned. Thus increasing the import of bastnaesite and thorium-free chlorinated rare earths and other intermediate products. Japan produces rare earth oxide unit size of a total of nine, including Japan yttrium company, the wild chemical Institute, three German Metal Industry Company three.