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Main Manufacturing Sites in Japan

NSK STEERING SYSTEMS CO., LTD. Soja Plant and Akagi Plant

  • General Information
  • Main Products
  • History
  • CSR
Soja Plant
Akagi Plant
Representative Kazunori Iritani, President
Capital 7,500 million yen
Soja Plant
1-8-1 Soja-machi, Maebashi City, Gunma, Japan
Akagi Plant
1240-1, Idoimachi, Maebashi City, Gunma, Japan
Soja Plant
Akagi Plant
Site area 156,788㎡
Number of employees 835(as of March 31, 2021)
Products Automotive product (steering systems and other products)
ISO Certifications
  • ISO9001
  • ISO14001

Soja Plant

Access by Train
10minutesbytaxi from the Shin-Maebashi Station.
Access by automobile
10 minutes from Maebashi IC, Kan-etsu expressway

Akagi Plant

Access by Train
20 minutes by taxi from the Isesaki Station.
Access by automobile
10 minutes from Isezaki IC, Kita-kanto expressway

NSK Steering Systems develops and manufactures steering components that are essential for the steering operation of vehicles.

Steering system components

Soja Plant

1961 Started operation in the Toba region, Maebashi City, as Kita Nippon Seiko (Gunma, Japan).
1967 Kita Nippon Seiko merges with NSK Ltd. and becomes Maebashi Plant.
1975 Soja Plant No.1 Building constructed in Soja area, operating as branch factory of Soja Plant.
1980 Soja Plant Buildings No.2 and No.3 constructed simultaneously.

Akagi Plant

1989 Started operation as branch factory of Soja Plant.

Soja Plant/Akagi Plant

1993 Maebashi, Soja and Akagi Plants consolidated to operate under a single administrative organization.
1999 Maebashi and Soja Plants splits off to oversee the production of specific products.
2001 Production, design and development sections for EPS splits off to form NSK Steering Systems Co., Ltd.
2002 Operation of NSK Soja and Akagi Plants transferred to NSK Steering Systems.
2005 Technology sections transferred from NSK Steering Systems to NSK.
2008 Administrative and production departments reorganized, and production departments transferred to Soja and Akagi Plants.

Summary of the environmental and social initiatives implemented at the Soja and Akagi Plants of NSK Steering Systems Co., Ltd.

1. Environmental Initiatives

Both the Soja and Akagi Plants engage in diverse initiatives to manage chemical substances and reduce energy consumption. The plants are directing considerable effort into initiatives aimed at using materials more efficiently and reducing resource waste.

Reducing Steering Column Components and Joint Shaft Materials
NSK Steering Systems Co., Ltd. has succeeded in using tube hydroforming* technology for the forming of components for automotive steering columns, so that a single component can replace several components that were previously welded and assembled. The change enables a 10% reduction in steel used.
NSK Steering Systems Co., Ltd. has also developed a process to manufacture joint shafts from hollow materials for mass production. Joint shafts are conventionally made using solid rod materials, but the innovation reduces the amount of steel used and enables a 30–50% reduction in the shaft weight.
* Tube hydroforming shapes materials by enclosing tubular materials in a die, using pressurization of water inside the tube to form shapes.
Fewer Parts for Steering Columns and Less Material for Joint Shafts
Reducing Waste from Materials for Electric Power Steering Parts
A part called a core plate is incorporated into the plastic gear used in the reduction gear in EPS to strengthen the section that fixes the central shaft in place. The core plate is produced using a press to punch out round pieces from sheet steel. Previously, the round pieces of metal were punched out from the steel material in a single line. By changing this to a double line, NSK reduced the waste portion by 30–40%.

2. Contributing to the Local Communities

Clean-up around plant
Clean-up around the plant
  • Donation of waste paper(newspapers) to local organizations
  • Clean-up activities around plants
  • Donation of equipment such as notice boards to local schools

(As of January 31, 2010)