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31Count～45Count（Total48Count）
Gold and Silver
Main products（Copper & Precious Metals, etc.）
IoT / Electronics Mobility Energy Raw materials / Resources / Recycling
raw materials
The rarity of gold drives its use in jewelry and as an investment instrument, while its workability and electrical conductivity drives its use in electronic components. Traditionally, the demand for silver was for use in photosensitive material, but now, it is often used for solar batteries and other electronic components.
Sulfuric acid
Main products（Copper & Precious Metals, etc.）
Life / Environment Raw materials / Resources / Recycling
raw materials
Sulfuric acid is used in a variety of applications, notably as the main ingredient in fertilizers, synthetic fibers, and titanium oxide, as well as an additive for deoxidizing and wastewater neutralization.
Mineral Resources(Zinc concentrate, Lead–Silver concentrate, Copper concentrate)
Main products（Mineral Resources）
Raw materials / Resources / Recycling
raw materials
The mining technologies that Mitsui Kinzoku developed at the Kamioka Mine (Gifu prefecture, Japan) now are adapted to our exploration, mining and mineral processing works at Huanzala Mine and Pallca Mine in Peru, South America. The ores exploited from these mines are processed on site by mineral processing plant to mainly produce Zinc concentrate, which will be delivered to our smelting plant in Japan to be treated to produce Zinc bullion.
Geothermal Resource
Main products（Mineral Resources）
Energy
raw materials
Okuaizu Geothermal Co., Ltd., our wholly-owned subsidiary provides Geothermal steam for Yanaizu-Nishiyama Geothermal Electric Power Plant operated by Tohoku Electric Power Co., Inc.,
Mineral Resources Development and Environmental Protection Engineering Services
Mineral Resources Development and Environmental Protection Engineering Services
Life / Environment Raw materials / Resources / Recycling
Resource Development Environmental Conservation
Mineral Resources Development Engineering Services. Environmental Protection Related Engineering Services.
Door Latch
Main products（Door Latch）
Mobility Parts / Building materials / Structural materials
Parts / materials
These lock mechanisms are mounted on doors, trunks, and seats of automobiles to provide passenger safety. Our locks are characterized by their small, lightweight, and durable design, and are the preferred choice of automobile manufacturers in Japan and overseas. In July 2010, the existing business division was reorganized into Mitsui Kinzoku ACT Corporation to further expand business, and currently operates as a dedicated manufacturer of automotive parts and components.
Nenisanso (a designated soil improvement material by the Soil Fertility improvement Act)
Main products（Perlite Business）
Life / Environment
raw materials
Nenisanso is a soil improvement material that capitalizes on the characteristics of Perlite, derived from pearlstone. The name “Neninsanso” means to “give oxygen to the roots” in Japanese. This Perlite-based soil improvement material produces ideal soil by adjusting the balance of moisture and oxygen.
Mitsui Perlite
Main products（Perlite Business）
Energy Life / Environment Parts / Building materials / Structural materials
raw materials Parts / materials
Mitsui Perlite is formed by crushing pearlstone, a natural volcanic glass, or pitchstone. This is then rapidly heated and allowed to expand, resulting in an airtight amorphous structure that is very light and has a white sand-like appearance.
ROKAHELP® (Perlite-based filter aid)
Main products（Perlite Business）
Life / Environment Raw materials / Resources / Recycling
raw materials materials
ROKAHELPR is a filter aid that is widely used in various fields including the food, pharmaceutical, and chemical industries.
Chemical Products Business
Main products（Chemical Products）
We manufacture and sell zinc oxide as well as lead oxide and zinc sulfate, which we are the only company to manufacture in Japan. Zinc oxide is used as a vulcanizing accelerator to strengthen rubber products. Lead oxide meanwhile is used as a vinyl chloride stabilizer, in paints and in electronic materials such as ceramic condensers. Zinc sulfate is used as a raw material in fabrics, paper, animal feed and health food products.
Powder metallurgy products
Other Businesses
IoT / Electronics Mobility Parts / Building materials / Structural materials
Parts / materials
These products are made from steel-based materials and find wide applications in various areas. We can provide parts of excellent quality, in high volume, and at low cost, particularly for automotive applications such as engine, suspension, and power steering parts.
aluminum- and magnesium-related die-casted products
IoT / Electronics Mobility Parts / Building materials / Structural materials
Parts / materials
We produce die-casts mainly using aluminum and magnesium, such as headlamp reflectors, heat sinks, inverter housings for EVs and HEVs, and other automotive components.
Mechatronics Business
Main products（Mechatronics Business）
IoT / Electronics Analysis / Inspection / Measurement
Equipment / Others
Mitsui Kinzoku Instrumentations Technology Corporation was formed through a merger between Mitsui Kinzoku’s Instrumentation Systems Division ?
Rolled Copper Business
Main products（Rolled Copper Business）
IoT / Electronics Mobility Parts / Building materials / Structural materials Plant
raw materials
We manufacture and sell plates and coils made using copper, copper alloys, and brass which is an alloy of copper and zinc, as well as various other rolled copper products. Our rolled copper products are used in various applications centered around automotive terminals and consumer device terminals. The rolled copper division is currently operated by Mitsui Sumitomo Metal Mining Brass & Copper Co., Ltd., as a result of a business merger with Sumitomo Metal Mining & Smelting Co., Ltd., in July 2010.
Corrosion Prevention Business
Main products（Corrosion Prevention Business）
Parts / Building materials / Structural materials Plant
Processing
Nakabohtec Corrosion Protecting Co., Ltd operates a corrosion prevention business designed to solve corrosion issues customers face with port and harbor structures that surround Japan, salt-air damaged concrete structures, pipelines that support life infrastructures, plant facilities, gate facilities, etc.