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We are dedicated to the development of user friendly products and thorough quality control. We conduct carbon and graphite refining, as well as the manufacture and sale of cast subsidiary materials.
Located within the Mizushima industrial complex, Marutoyo Chuzai Seisakusho Co., Ltd. conducts carbon and graphite refining, as well as the manufacture and sale of cast subsidiary materials.

Coke is an essential material for use in the iron, steel and refractory industries. Bituminous coal and natural graphite are indispensable as materials for casting production, and as materials in batteries.

We believe the wide range of iron, casting, refractory, battery and friction material industries to be important to our country, which is why we are dedicated to stringent quality control.

Our Shin-minato factory acquired ISO9001:2000 accreditation in January, 2004.

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