Industrial domain


Nippon Steel & Sumikin SG Wire Co., Ltd., Narashino Plant

We support the world in the field of “wire”.

We are a global special steel wire manufacturer that boasts strong market share inside and outside Japan with our wires for valve springs used in automobile engines.
In addition to the automobile industry, we also contribute to society in a wide range of domains, such as home appliances, precision and communications devices, civil engineering work and medical devices.
Postal code


Address Narashino Plant: 7-5-1 Higashi-Narashino, Narashino-shi; Group companies on site: Suzuki-Sumiden Stainless Steel Wire Co., Ltd., Ichikawa Seisen Co., Ltd., SKK Technology Co., Ltd.
Phone number +81-47-476-3111
Fax +81-47-474-1536
Representative director

President & CEO Masayuki Shibata


Capital 3,634million yen
Number of employees 415

Business activities

- Manufacturing, processing and sale of piano wires, hard drawn steel wires, oil tempered wires, PC steel wires, etc.
- Manufacturing, processing and sale of products made from various kinds of metals and plated products
- Manufacturing, processing and sale of medical devices

Main products and processes

- Piano wires
- Hard drawn steel wires
- Oil tempered wires
- Titanium wires
- Shaped wires, etc.

Facilities and equipment

  • - Wire drawing machine
  • - Heat treatment furnace
  • - Stranding machine
  • - Rolling machine
  • - Flaw detection machine
  • - Pickling line
  • - Research equipment, etc.