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  1. Home
  2. Manufacturing and processing contract
  3. 八千代工機
Manufacturing and processing contract
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八千代工機

EstablishmentFounded in March 1946 / Established in June 1976
capital5000Ten thousand
number of employees70
addressOsaka/Yao-shi/3-5-5 Fukuei-cho
phone072-990-3181
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last updated:Feb 16, 2026
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  • Products/Services(27)
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八千代工機 Company Overview

Supporting Japan's infrastructure with cultivated product technology.

Our company designs and manufactures a variety of steel structure products, including steel towers, steel columns, and beams, in various shapes and sizes to meet customer requests. Additionally, leveraging our long-standing railway technology experience, we are engaged in product development across various fields such as "roads, communications, and power." We can accommodate production quantities from a single unit to mass production. Please feel free to contact us with your inquiries. 【Products Offered】 ■ Steel pipe columns and steel pipe beams ■ Angle beams and steel columns ■ Various types of frames ■ Ducts and pull boxes, etc. *For more details, please download the PDF or feel free to contact us.

Business Activities

We design and manufacture in-house. Please refer to the list below for our machinery and equipment. If you have any questions, feel free to contact us. 【Main Equipment】 Brake Press 50t - 1 unit Brake Press 100t - 1 unit Hydraulic Press 35t, 40t, 45t, 80t, 100t, 110t, 200t - total of 8 units Horizontal Press - 1 unit Electric Furnace W1100×L3450×H180 - 1 unit Gas Furnace W650×D1100×H300 - 1 unit Induction High-Frequency Heating Furnace - 1 unit Beam Worker (made by Amada) - 1 unit Iron Worker (made by Amada) - 1 unit Plasma Cutting Machine (made by Komatsu) - 1 unit Semi-Automatic Arc Welding Machine - 18 units Welding Robot (made by Daihen) - 4 units Welding Robot (self-propelled, made by Shinko) - 1 unit Machining Center - 1 unit Saw Cutting Machine - 1 unit Pipe Coaster 600MT - 1 unit Table Cutting Machine - 1 unit Radial Drill - 1 unit

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Seismic design and strength calculation support

Seismic design and strength calculation support

We have extensive experience in seismic design contracts from design offices. We support the safety of structures from the design stage, including advice on strength calculations, processing, and assembly.

Yachiyo Koki leverages its long-standing expertise in precision machining to support customers from the design and strength calculation stages. Based on extensive experience in the railway and infrastructure sectors, where high safety standards are required, we have received numerous outsourcing requests for "seismic design" and "strength calculations" from design offices. 【Technical Support from the Design Department】 - Advice on seismic design and strength calculations: We provide design advice that balances safety and machining efficiency by identifying structural weaknesses in advance. - Flexibility in drawing responses: We support optimal realization considering strength, materials, and machining methods, even from conceptual drawings. - Integrated design and machining system: Since designers who understand the actual manufacturing site are in charge, smooth development without setbacks is possible, not just based on numerical calculations. We offer technical proposals that go beyond the boundaries of machining companies to address challenges such as "insufficient design resources," "concerns about maintaining strength with this shape," and "desiring a structure that considers seismic resistance." We also accept design support for custom products starting from one piece and for complex fabricated structures. Please feel free to consult us starting with just a conceptual drawing.

Products/Services (27)

Mobile welding robot product image
Mobile welding robot
Welding robot product image
Welding robot
[Equipment] Hydraulic Press product image
[Equipment] Hydraulic Press
【Equipment Held】Crank Press product image
【Equipment Held】Crank Press

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catalog(7)

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Seismic design and strength calculation support

Seismic design and strength calculation support

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Hot forming and pressing process

Hot forming and pressing process

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List of Production Equipment and Machinery

List of Production Equipment and Machinery

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Lightning suppression type lightning rod "PDCE"

Lightning suppression type lightning rod "PDCE"

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news(4)

Introduction to "Original Emergency Food!!" Utilizing Freeze-Drying Technology

  • PRODUCT

This is an introduction to our "Original Emergency Food" utilizing the "Two-Layer Stainless Steel Tray" produced by our company! We can produce freeze-dried food in small batches! It is possible to manufacture "Original Emergency Food" that reflects the characteristics of various regions across Japan. Not only suitable for emergency stockpiling, but also great as gifts for events! Please take a look at our brochure.

Mar 07, 2026

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About the manufacturing cooperation system with a specialized aluminum welding processing factory.

  • OTHER

The demand for aluminum products that are durable and lightweight is increasing. At our company, we have established a system that can handle everything from one-off items to mass production in collaboration with a specialized aluminum welding processing factory after material processing.

Feb 12, 2026

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Start of sales for "aerogel material" with excellent heat resistance, insulation, and soundproofing properties.

  • PRODUCT

Starting from January 26, we began selling products made with "aerogel material," which excels in heat resistance, insulation, and soundproofing. The "aerogel material" is in a mat form, easily cut, and can be installed in various locations. It is currently used in vehicle interiors and substations. There are various installation methods available, and we can provide proposals from our company.

Jan 25, 2026

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Detailed information

Company name 八千代工機
number of employees70
Contact addresspostalcode 581-0844 Osaka/ Yao-shi/ 3-5-5 Fukuei-choView on map TEL:072-990-3181 FAX:072-990-2781
Key PartnersShinsei Technos Corporation, JR West Japan Electric Systems Corporation, Nippon Densetsu Kogyo Corporation, Yachiyo Electric Construction Industry Corporation, JR Kyushu Electric Systems Corporation, Chuo Densetsu Corporation, Mitsubishi Heavy Industries Corporation, Niigata Transys Corporation, Kansai Electric Engineering Co., Ltd., West Japan Railway Company, Central Japan Railway Company, Tokyo Metro Co., Ltd., and others.
Industry Manufacturing and processing contract
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