Core facilities / group companies

Domestic Group Companies

Mineral Resources Business

Sumiko Resources Exploration & Development Co., Ltd.

Address
8-21, Toranomon 3-chome, Minato-ku, Tokyo 105-0001, Japan
Phone · Facsimile

Phone: 81-3-5405-2172 
Facsimile: 81-3-5405-2175

Operations
  1. Resources geological surveys
  2. Civil engineering geological surveys
  3. Test boring
  4. Civil engineering and construction work
  5. Surveying
  6. Environmental surveys
  7. Sale of drilling equipment
URL

http://www.sred.co.jp/english/

Smelting & Refining Business

Shisaka Smelting Co.,Ltd.

Photo: Shisaka Smelting Co.,Ltd.

Shisaka Island (lit. “four sloped islands”) is located around 20km off the coast of the city of Niihama in Japan’s Ehime Prefecture. As the name would suggest, this is actually a group of four islands; Minoshima, Ienoshima, Myojinshima, and Nezumijima, with the plant being located on Ienoshima island. With a number one priority of protection of the natural environment, Shisaka Smelting Co., Ltd. undertakes recycling operations where it leverages smelting and refining technology to recover zinc from the ash left over from steel making in furnaces.

Facility
Address
5-3, Nishibara-cho 3-chome, Niihama-shi, Ehime 792-0011, Japan
Detailed map
Google Map
Phone · Facsimile

Phone: 81-897-34-6820 
Facsimile: 81-897-33-7762

Operations

Manufacture of crude zinc oxide

Hyuga Smelting Co., Ltd.

Photo: Hyuga Smelting Co., Ltd.

Hyuga City in Japan’s Miyazaki Prefecture is an industrial city that is home to Hososhima Port, which forms a gateway to the sea in central Kyushu. Hyuga Smelting Co., Ltd. (shareholder ratio: Sumitomo Metal Mining 60%, Nippon Steel Stainless Steel 25%, MITSUI & CO., LTD. 15%) leverages the superb advantages of the location of the plant to produce ferronickel while ensuring harmony with the beautiful nature of the area.

Facility
Address
5, Funaba-cho, Hyuga, Miyazaki 883-8585, Japan
Detailed map
Google Map
Phone · Facsimile

Phone: 81-982-52-8101 
Facsimile: 81-982-53-5513

Operations

Ferro-nickel smelting

Mitsui Sumitomo Metal Mining Brass & Copper Co., Ltd.

Address
Futatsumiya 656-1, Ageo-Shi, Saitama 362-0017, Japan
Phone · Facsimile

Phone: 81-48-775-7111 
Facsimile: 81-48-775-9189

Operations

Manufacture and sale of copper & brass products and processed copper and brass products

URL

http://www.msmmbc.co.jp/ (Japanese Version Only)

Sumiko Logistics Co., Ltd.

Address
5-3, Nishibara-cho 3-chome, Niihama, Ehime 792-0011, Japan
Detailed map
Google Map
Phone · Facsimile

Phone: 81-897-37-2474 
Facsimile: 81-897-37-3477

Operations
  1. Marine transport
  2. General port transportation
  3. Port services
  4. Land transportation
  5. Non-life insurance agency
  6. Packaging operations
  7. Water supplyg
  8. Waste disposal related operations
URL

http://sklco.com/(Japanese Version Only)

Acids Co., Ltd.

Address
10-5, Shimbashi 5-chome Minato-ku, Tokyo 105-0004, Japan
Phone · Facsimile

Phone: 81-3-6402-7533 
Facsimile: 81-3-3437-0223

Operations

Manufacture and sale of sulfuric acid and related products

MS Zinc Co., Ltd.

Address
18-16, Shimbashi 1-chome Minato-ku, Tokyo 105-0004, Japan
Phone · Facsimile

Phone: 81-3-3591-3110 
Facsimile: 81-3-3591-3125

Operations

Purchase of raw materials of crude zinc oxide

Materials Business

Sumiko Kunitomi Electronics Co., Ltd.

Address
351-1 Kunitomi, Kyowa-cho, Iwanai-gun, Hokkaido 048-2143, Japan
Detailed map
Google Map
Phone · Facsimile

Phone: 81-135-72-1211 
Facsimile: 81-135-72-1200

Operations

Manufacture of crystal products and magnetic materials

URL

https://www.sumiko-kunitomidenshi.jp/(Japanese Version Only)

Ohkuchi Electronics Co., Ltd.

Address
1755-2, Ohkuchi-Ushio, Isa, Kagoshima 895-2501, Japan
Phone · Facsimile

Phone: 81-995-22-7511 
Facsimile: 81-995-22-8579

Operations
Manufacture of functional inks and crystal products, recycling of precious metals
URL
http://www.ohkuchielectronics.co.jp

SMM Precision Co., Ltd.

Address
4-4 Ougibuchi, Ougida, Noshiro, Akita 016-0122, Japan
Phone · Facsimile

Phone: 81-185-70-1161 
Facsimile: 81-185-70-1166

Operations

Manufacture of optical communications components

URL
https://www.smmp.co.jp

GRANOPT Co., Ltd.

Address
4-4 Ougibuchi, Ougida, Noshiro, Akita 016-0122, Japan
Phone · Facsimile

Phone: 81-44-223-4010 
Facsimile: 81-44-223-4011

Operations

Manufacture and sale of rare earth iron garnet (RIG)

URL

http://www.granopt.jp/en/

Tokyo Div.

14-19 Ogawa-cho, Kawasaki-ku, Kawasaki, Kanagawa 210-0023, Japan
Phone: 81-44-223-4010 
Facsimile: 81-44-223-4011

Niihama Electronics Co., Ltd.

Address
1-10, Oji-cho, Niihama, Ehime 792-0008, Japan
Phone · Facsimile

Phone: 81-897-37-2411 
Facsimile: 81-897-37-2412

Operations
  1. Manufacture of adhesiveless copperclad polyimide film
  2. Manufacture of battery materials
URL

https://www.niihamadenshi.jp (Japanese Version Only)

Shinko Co., Ltd.

Address
12238, Nakaminowa, Minowama-machi, Kamiina-gun, Nagano 399-4692, Japan
Phone · Facsimile

Phone: 81-265-79-0121 
Facsimile: 81-265-79-4833

Operations

Development design, manufacture and sale of substrate for multi layer / double-sided wiring board

URL

http://www.shinkoss.co.jp (Japanese Version Only)

Sumiko Tec Co., Ltd.

Address
2-3-19,Shinyokohama, Kohoku-ku, Yokohama, Kanagawa 222-0033, Japan
Phone · Facsimile

Phone: 81-45-285-2341 
Facsimile: 81-45-285-2375

Operations

Terminals and connectors for electronic and electric equipment components, electric wire, power cords and pressure bonding machines relating to the above, and their mentainance Manufacture and sale of formed products for optical equipment, etc.

URL

http://www.sumiko-tec.co.jp (Japanese Version Only)

N. E. Chemcat Corporation

Address
4-1, Hamamatsucho 2-chome, Minato-ku, Tokyo, 105-6124 Japan (World Trade Center Building, 24F)
Phone · Facsimile

Phone: 81-3-3435-5490 
Facsimile: 81-3-3435-5484

Operations
  1. Manufacturing and sale of automotive catalyst and chemical catalyst
  2. Precious metal recovery and refining
URL

http://www.ne-chemcat.co.jp/eg/

Nippon Ketjen Co., Ltd.

Address
1-2-1, Shibaura, Minato-ku, Tokyo 105-6791, Japan (Seavans North, 20F)
Phone · Facsimile

Phone: 81-3-5442-5061 
Facsimile: 81-3-5442-5070

Operations

Manufacture and sale of hydroprocessing catalysts/off-site regeneration service and catalysts reactivation service

URL

http://www.nippon-ketjen.co.jp/en/

Sumitomo Metal Mining Siporex Co., Ltd.

Address
11-3, Shimbashi 5-chome Minato-ku, Tokyo 105-0004, Japan (Shimbashi Sumitomo Building, 4F)
Phone · Facsimile

Phone: 81-3-3435-4660 
Facsimile: 81-3-3435-4651

Operations

Manufacture and sale of ALC (Autoclaved Light-weight Concrete) and other construction materials/ Manufacture and sale of seismic isolation devices

URL

http://www.sumitomo-siporex.co.jp (Japanese Version Only)

Sumico Lubricant Co., Ltd.

Address
11-3, Shimbashi 5-chome Minato-ku, Tokyo 105-0004, Japan (Shimbashi Sumitomo Building, 7F)
Phone · Facsimile

Phone: 81-3-5425-6702 
Facsimile: 81-3-5401-0471

Operations

Manufacture and sale of various lubricants (particularly special lubricants containing molybdenum)

URL

http://www.sumico.co.jp/e/

Ohkuchi Materials Co., Ltd.

Address
1746-2, Ohkuchi-Ushio, Isa, Kagoshima 895-2501, Japan
Phone · Facsimile

Phone: 81-995-22-8421 
Facsimile: 81-995-22-9774

Operations

Manufacture of leadframes

Sumiko Energy Materials Co., Ltd.

Address
1-1 Aza Nakamaru, Oaza Yamadaoka, Naraha-machi, Fukushima, Japan
Phone · Facsimile

Phone: 81-240-25-8005 
Facsimile: 81-240-25-8011

Operations

Manufacture of battery materials

URL

http://www.sumiko-em.co.jp (Japanese Version Only)

SICOXS CORPORATION

Address
11-3, Shimbashi 5-chome Minato-ku, Tokyo 105-0004, Japan (Shimbashi Sumitomo Building, 7F)
Phone · Facsimile

Phone: 81-3-3437-5220 
Facsimile: 81-3-3437-5222

Operations

Development, Manufacture, Sales, of SiC substrate for power semiconductor

URL

https://www.sicoxs.com/en/

Other Business

Sumitomo Metal Mining Engineering Co., Ltd.

Address
11-3, Shimbashi 5-chome, Minato-ku, Tokyo 105-8716, Japan
Phone · Facsimile

Phone: 81-3-5425-4431 
Facsimile: 81-3-5425-5727

Operations

Environment sector machinery & equipment, Plant survays, etc. design, manufacturing and repair & maintenance

URL

http://www.smmec.co.jp/en/

Sumiko Techno-Research Co., Ltd.

Address
17-2, Isoura-cho, Niihama, Ehime 792-0002, Japan
Phone · Facsimile

Phone: 81-897-34-3411 
Facsimile: 81-897-33-1864

Operations
  • Sample-collection, preparation and analysis of non-ferrous metals
  • Analysis of non-ferrous metal / functional materials
  • Analysis of the operational control / R&D of the SMM Group
  • Environmental measuring/water quality certification, air, soil, noise, vibration, etc.
  • Measuring the working environment
  • Environmental assessment and ecological examination accompanying various types of development activities
URL

https://www.sumikou-techno.jp/ (Japanese Version Only)

Sumiko Technical Service Co., Ltd.

Address
1-6, Soubiraki-cho, Niihama, Ehime 792-0001, Japan
Phone · Facsimile

Phone: 81-897-33-1050 
Facsimile: 81-897-33-1570

Operations
  • Commission-based work about processing mineral ore and artifact made with nonferrous metals
  • Commission-based work in area of nonferrous smelting
  • Commission-based work in area of battery materials manufacturing
  • Commission-based work about cleaning and maintenance for welfare facilities
  • Commission-based work about weeding and pruning
  • Golf practice range management
  • Real estate business
URL

https://www.sumiko-ts.co.jp/(Japanese Version Only)

Igeta Heim Co., Ltd.

Address
16-11, Takadanobaba 2-chome, Shinjuku-ku, Tokyo 169-0075, Japan (Takadanobaba 216 Building, 4F)
Phone · Facsimile

Phone: 81-3-5292-0816 
Facsimile: 81-3-5292-0815

Operations

Renovation of steel frame and reinforced concrete apartments and condominiums as well as those built by ALC method (Buildings and homes)

Japan Irradiation Service Co., Ltd.

Address
2600, Ishigamitojuku, Tokai-mura, Naka-gun, Ibaraki 319-1101, Japan
Phone · Facsimile

Phone: 81-29-270-5111 
Facsimile: 81-29-270-4581

Operations

Irradiation sterilization service for pharmaceutical products, medical instruments, and pharmaceutical containers,etc., /Modification of various industrial materials

URL

http://www.jisco-hq.jp/ (Japanese Version Only)

JCO Co., Ltd.

Address
2600, Ishigamitojuku, Tokai-mura, Naka-gun, Ibaraki 319-1101, Japan
Phone · Facsimile

Phone: 81-29-287-0511 
Facsimile: 81-29-282-7884

Operations

Management of facilities using uranium and related waste

URL

http://www.jco.co.jp/(Japanese Version Only)