みついきんぞくこうぎょう 三井金属鉱業 LinksSentence search for 三井金属鉱業Sentence search for みついきんぞくこうぎょうKanji details for 三, 井, 金, 属, 鉱 and 業Edit in JMdict Noun1. Mitsui Mining And Smelting Company, LimitedOrganization nameOrganization2. Mitsui Mining And Smelting Company, Limited Discussions Log in to talk about this word.