Factory & Group


  • Factory & Group

Factory/Sales office

Yura Plant

Achieved integrated production of modules for instrument panels with flexible facilities

The head office/Headquarters plant has stood on the same site since our company was established. Today, after going through many extensions of floor space, located on the site are the main office and plant housing main office functions, and the adjacent west plant. The plants are mainly responsible for the integrated production of instrument panels. The operations of the headquarters plant include a molding line with a large injection-molding machine, mold management, foam-molding process, and welding process. The operations of the west plant across the street include skin molding, painting process, welding process, and acceptance and inspection of various parts, as well as the assembly line for instrument panel modules. We have established a production system that allows for flexibility in meeting demand for product diversification and shorter delivery times.

  • Address: 330 Yura-cho, Ota-shi, Gunma 373-8588, Japan
  • TEL. +81-276-31-3913 FAX. +81-276-31-1812
  • Established: 1960
  • Access: About 19 minutes by car from Ota-Kiryu IC on the Kita-Kanto Expressway
    5-minute walk from Hosoya Station

Ichinokura Plant

The industry's top-level production base with state-of-the-art machines and equipment

The Ichinokura Plant produces a wide range of parts for automotive interior and exterior, including door trims and roof trims. The plant has independently developed a system to manufacture large urethane foam blocks along with the foam block cutting machine. It is also responsible for a range of processes, including press processing, cutting, welding, and assembly, with a production environment that can flexibly meet demand for product diversification. In addition, the newly built adjacent plant has introduced an automated assembly line for door modules using the latest large injection-molding machine and robots. This is one of the most advanced production environments in the industry. The plant also houses a testing area with a crash simulator and a development and test wing for resin materials.

  • Address: 281 Nittaichinokura-cho, Ota-shi, Gunma 373-0306, Japan
  • TEL. +81-276-57-3511 FAX. +81-276-57-3510
  • Established: 1983
  • Access: About 9 minutes by car from Ota-Yabuzuka IC on the Kita-Kanto Expressway

Kizaki Plant

Eco-factory, friendly to both the environment and workers

With the concept of SCS (Simple, Compact, Smart) factory, the Kizaki Plant realizes high efficiency. Thoroughly eliminating waste and loss, this plant aims to be an environmentally friendly plant. It is also important that the plant is clean and comfortable for everyone who works there. We want the Kizaki Plant to be a healthy and attractive plant where each person woks energetically. The plant also aims to be loved by the communities. Adjacent to the Kizaki Station, it is possible to commute by train, which is good for the environment.

  • Address: 49-2 Nittakizaki-cho, Ota-shi, Gunma 370-0321, Japan
  • TEL. 0276-55-8345 FAX. 0276-55-8349
  • Established: 2022
  • Access: 3-minute walk from Kizaki Station North Exit

Nitta Plant

A base for making prototypes at development phase, in addition to upholstery cutting process

The Nitta Plant is equipped with a large-scale upholstery cutting machine for automobile interiors and construction machinery seats, welding machines, and pipe benders.
To verify the mass production feasibility at the development stage, we identify problems and challenges, such as in the assembly of new parts, and the workability of sewing and wrapping upholstery. We solve the problems by working together with the production department.

  • Address: 329-1 Nittaakabori-cho, Ota-shi, Gunma 370-0331, Japan
  • TEL. +81-276-56-7900 FAX. +81-276-56-7934

Osaka Sales Branch

Sales and technical base for customers located in Western Japan

The Osaka Sales Branch is a base to expand our sales to automakers and industrial machinery manufacturers which have their bases in Western Japan, and to build close relationships with our customers.
This branch also serves as a design branch office. We are able to quickly solve customers’ technical issues.

  • Address: Room 304, Kanda 2nd Building, Jyonan 2-chome 7-6, Ikeda-shi, Osaka-fu 563-0025, Japan
  • TEL. +81-72-734-7881 FAX. +81-72-734-7883
  • Established: 2020
  • Access: 5-minute walk from Ikeda Station

Group Enterprise


Shigeru Tec Co., Ltd.
Address: 366 Nittakizaki-cho, Ota-shi, Gunma 370-0321, Japan
TEL +81-276-56-2320
Representative Souma Teruhiko
Established February 1957
Capital 62 million yen
Employees 194
Business Activities The manufacture of automotive interior parts, industrial machinery seats
Web http://shigeru-tec.com/
Athos Co., Ltd.
Address: 19-16 Yoriai-cho, Ota-shi, Gunma 379-2305, Japan
TEL +81-277-78-6221
Representative Tanaka Keiji
Established April 1982
Capital 100 million yen
Employees 160
Business Activities The manufacture and sale of resin products
Web http://www.athos.co.jp/
Siegel Co., Ltd.
Oshinden Plant
Address: 300-3 Oshinden, Nakatsu-shi, Oita 871-0001, Japan
TEL +81-979-26-0955
Tajiri Plant
Address: 2680-8 Tajiri, Nakatsu-shi, Oita 879-0123, Japan
TEL +81-979-26-5562
Representative Jiro Shimizu
Established September 2003
Capital 100 million yen
Employees 138
Business Activities The manufacture of instrument panels, door trim, etc.
Web https://siegel-nakatsu.com/
Address: 160-2 Maki, Aza, Kahokucho-yachi, Nishimurayama-gun, Yamagata 999-3511, Japan
TEL +81-237-72-7121
Representative Koki Okuma
Established August 1956
Capital 78 million yen
Employees 60
Business Activities Design and manufacturing of injection molds
Prototyping and mass production of various resin molded products
Research and development of fine special processing
Teaching and guidance of mold and molding know-how for designers and manufacturers
Web https://ibuki-mold.co.jp/


Heartland Automotive LLC. (Greencastle)
Address: 300 S. 10th Street Greencastle, IN 46135 U.S.A.
TEL 765-653-4263
Representative Okane Tatsushi
Established August 1987
Capital $50,605,000
Employees 426
Business Activities The manufacture of instrument panels, door trim, etc.
Web http://www.hauto.net/
Heartland Automotive LLC. (Lafayette)
Address: 3700 David Howarth Drive Lafayette IN 47909 U.S.A.
TEL 765-446-2311
Representative Okane Tatsushi
Established August 1987
Capital $50,605,000
Employees 470
Business Activities The manufacture of instrument panels, door trim, etc.
Web http://www.hauto.net/
Shigeru (Thailand) Co., Ltd.
Address: Babgrak, Dangkok 10500 Thailand
TEL +66-0-3860-6030
Representative Yamasita Hideki
Established January 2008
Capital 140 million BAHT
Employees 51
Business Activities The manufacture and sale of seats for industrial machinery and automotive parts
Wuhu Maoxin Co., Ltd.
Address: WU HU SHI, An hui sheng, China
TEL +86-553-5968-015
Representative Zhu kehang
Established June 2009
Capital $1,400,000
Employees 35
Business Activities The manufacture and sale of seats for industrial machinery and automotive parts