Summarized translation of a report by Kameki Kinoshita, published in Japanese in 1943, on kuroko deposits (black ore deposits) of Japan. "Kuroko means two things. One is the common mixture of sphalerite, galena, and barite which is ordinarily black to grayish white, depending on the proportion of barite. The other meaning is the unusual assemblage of separate bodies of: 1, sphalerite-galena-barite; 2, massive pyrite; 3, disseminated chalcopyrite in silicified rock; and 4, massive gypsum. Rarely are all four of these ore bodies present in any one mine, yet the assemblage is still called kuroko, regardless of color."

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