ロゴマーク中国精螺株式会社 CHUGOKU SEIRA CO., LTD.

Starting this fiscal year, we have begun offering our Company Open House and are now accepting registrations. Registrations are accepted on a rolling basis, so please feel free to contact us.   The event is designed to help you understand what kind of company Chugoku Seira Co., Ltd. is and to give you a clear picture of our day-to-day work. We anticipate the session will last around 2 to 3 hours.   Because it requires less time than our internship (two-day program), which we are also announcing, we hope you will feel free to reserve a spot and join us.   Content: company briefing, factory tour, hands-on work experience, and interaction with senior employees Fields: Manufacturing / Sales / Quality Control / Production Technology   We will coordinate the schedule and detailed content when you make a reservation or inquiry.   We look forward to hearing from you.   ■The schedule for our Company Open House is as follows.   [Program]  
  1. Company overview
  2. Our hiring and selection process
  3. Hear from senior employees about post-joining roles and responsibilities
  4. Watch an introduction video about Chugoku Seira Co., Ltd.
  5. Factory tour
  6. Q&A and announcements
  7. Complete a questionnaire
    ■Venue Chugoku Seira Co., Ltd.     ■Access From the Sanyo Main Line, get off at Hachihommatsu Station or Jike Station; it’s about a 10-minute drive to the Isomatsu Kogyo Danchi (Industrial Park). If you plan to come by car, please contact us in advance. Pick-up and drop-off at Hachihommatsu Station or Jike Station are available — please feel free to ask!     ■Inquiries Chugoku Seira Co., Ltd., Recruitment Contact: Yoneki Tel: 082-428-1000 Email: yoneki@chugokuseira.co.jp
We continue to accept applications for internships. Applications are accepted on a rolling basis, so please feel free to contact us.   The program is designed to help you understand what kind of company Chugoku Seira Co., Ltd. is and to give you a clear picture of our day-to-day work.   Content: company briefing, factory tour, hands-on work experience, and interaction with senior employees (two-day program) Fields: Manufacturing / Sales / Quality Control / Production Technology   We will coordinate the schedule and detailed content when you make a reservation or inquiry.   We look forward to hearing from you.   Tel: 082-428-1000 Email: yoneki@chugokuseira.co.jp Corporate Planning Division: Yoneki
Starting this fiscal year, Chugoku Seira Co., Ltd. began accepting participants for our internship program. We posted the information on Mynavi Corporation’s website during the summer period (June 1 to September 30).   While this posting period has ended, we will continue to accept interns. If you would like to participate, please contact us using the information below.   Through this internship, you will thoroughly learn about what kind of company Chugoku Seira Co., Ltd. is, and what kind of work we do on a daily basis.   Content: Company information session, plant tour, hands-on work experience, interaction with current employees, etc. Job categories: Manufacturing, sales, quality control, production technology   Please call us to make arrangements regarding the details.   TEL: 082-428-1000 Email: yoneki@chugokuseira.co.jp Corporate Planning Section : Yoneki
Our company’s founder, Matsuhiro Okumoto, passed away on June 3 (Monday), 2024. We respectfully make this announcement with profound gratitude for your kindness during his lifetime.   The wake and funeral were family-only, so it was decided to release this obituary after the Buddhist services. We hope you will understand.   Due to the strong wishes of the surviving family, all flowers, offerings, condolence money, condolence telegrams, condolence calls, and the like will be declined. There are plans to hold a memorial gathering in the Small Hall of the Higashi Hiroshima Arts & Culture Hall Kurara on October 4, starting at 13:30.   Thank you for your understanding.  

Yuruson Co.,Ltd.

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Equipment

Clean and comfortable workplaces are maintained by thoroughly implementing 6S methodology (sorting, setting-in-order, shining, standardizing, sustaining the discipline, and sustaining good habits).

picture of AKAMAZ  XD-10i
TAKAMAZ XD-10i
picture of TAKAMAZ  XC-100
TAKAMAZ XC-100
picture of Nut caulking machine
Nut caulking machine
Grinder/Lathe Model # Manufacturer No. of units
Surface grinder GMV-760G2 Daisho Seiki Co., Ltd. 1
Surface grinder V-5P Nissei Industry Corporation 1
NC lathe LB400-M Okuma Corporation 1
NC lathe LCS-15 Okuma Corporation 1
NC lathe LB-12 Okuma Corporation 1
NC lathe LX-06 Citizen Machinery Co., Ltd. 1
NC lathe NUCLET-10 Eguro.Ltd. 1
NC lathe WT-150 Nakamura-Tome Co., Ltd. 1
NC lathe XC-100 Takamaz Machinery Co., Ltd. 2
NC lathe XL-100 Takamaz Machinery Co., Ltd. 2
NC lathe XD-10i Takamaz Machinery Co., Ltd. 1
Automated machine Model # Manufacturer No. of units
Edge cutting machine ∅20 to 25 4
Grooving machine ∅5 to 10 3
R cutting machine R22 to 23 1
Pointing machine ∅3 to 10 1
Counterbore machine ∅10 1
Tapping machine M4 to 14 4
Nut caulking machine M6 to 18 7
Spot welding machine 50KVA 5
Induction hardening machine 30KW 1
Tapping machine YRS-SYFK-SMZ Furukawa Seiki Co., Ltd. 1
Semi-automated machine Model # Manufacturer No. of units
Surface polishing machine ∅20×t3.5 1
Centerless polishing machine ∅15 2
Screw rolling machine M6 to 14 3
R cutting machine R22 to 23 1
Nut assembling machine M14 2
Hydraulic press HYP2000N 1
Drill polishing machine Big Tools EZ-13 1
Semi-automated machine Model # Manufacturer No. of units
Roughness measuring instrument SURFCOM1400D-12 Tokyo Seimitsu Co., Ltd. 1
3D measuring instrument SVA600A Tokyo Seimitsu Co., Ltd. 1
Projection Machine Mitutoyo 1
Degreasing equipment, kerosene wash 1

Yuruson Co.,Ltd.

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Product Processing

Picture of cutting forged products
Cutting forged products
Picture of thread rolling forged products
Thread rolling forged products
Picture of induction hardening
Induction hardening
picture of caulking
Caulking
picture of cap molding
Cap molding
picture of image inspection
Image inspection
picture of 3D measurement
3D measurement
picture of shape measurement
Shape measurement

Yuruson Co.,Ltd.

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History

July 1985
Yuruson Co.,Ltd. is established with a capital of 5 million yen in Takaya-cho, Higashihiroshima-shi, and starts the production of bolts.
June 1989
Patent rights acquired for locking nuts (Yuruson nuts).
February 1991
Head Office relocated to Hachihonmatsu-cho, Higashihiroshima-shi.
Plant relocated to Kouchi-cho, Kamo-gun, Hiroshima-ken, and production of weld nuts starts.
April 1991
Technical tie-up with Boltun Corporation (Taiwan).
February 1993
Rights acquired from Disc-Lock International (USA) for the sale of locking nuts (D-Lock nuts) in nine countries in Asia, including Japan.
Application submitted for utility model registration for locking bolts (Y-Lock bolts).
October 1993
D・L・Y, a distributor of D-Lock nuts, established in Japan (with 10 member companies).
April 1994
Exclusive agency agreement concluded with Keyang Electric Machinery Co., Ltd. (Korea) for D-Lock nuts in Korea.
June 1994
Exclusive agency agreement concluded with Harlin International Co., Ltd. (Taiwan) for D-Lock nuts in Taiwan.
September 1994
Technical tie-up with Taeyang Metal Ind. Co., Ltd. (Korea).
November 1994
Capital increased to 10 million yen, application submitted for utility model registration for new weld nut.
January 2001
Head Office and plant relocated to current location (Hachihonmatsu Iida, Higashihiroshima-shi).
September 2001
OKUMOTO Tetsushi appointed company president. Started new business, such as secondary processing.
November 2007
Trading started with Ni-Thai Engineering Co., Ltd. (Thailand)
October 2008
ISO9001 2000 certification acquired.
October 2009
ISO9001 2008 certification acquired.
October 2017
ISO9001 2015 certification acquired.

Yuruson Co.,Ltd.

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Overview

Company name
Yuruson Co.,Ltd.
Representative
OKUMOTO Tetsushi
Founded
July 1, 1985
Capital
10 million yen
Business
  • Manufacture and processing of bolts and nuts
  • Cutting and polishing of steel
Main clients
  • Chugoku Seira Co., Ltd.
  • Ohmori Co.,Ltd.
  • Microtechno Corporation
  • Ooyama Co., Ltd.
  • Sakamoto Jukoh Co., Ltd.
  • Hayashi Industrial Factory
Address
2-8-4 Hachihonmatsu Iida, Higashihiroshima-shi 739-0146 (on the Chugoku Seira site)
Telephone:082-428-5099 Facsimile:082-428-5154
E-mail:tok@ysn-net.com

Yuruson Co.,Ltd.

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picture of the Yuruson factory

Yuruson Co.,Ltd. performs cutting, threading, and polishing of automotive parts and home appliances.

Quality Policy

We manufacture our products with a focus not only on minute details and an overall view, but also the trend of the times.

Company

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Access

  • Head Office

  • Address: 2-8-4 Hachihonmatsu Iida, Higashihiroshima-shi 739-0146
  • Telephone: 082-428-1000
  • Facsimile: 082-428-4447
  • Plant in Thailand

  • Address: 700/697 Moo7,Tambon Don Hua Roh,
    Amphur Muang Chonburi, Chonburi 20000 Thailand
    TEL/038-193-258~9
  • Yuruson Co.,Ltd.

  • Address: 2-8-4 Hachihonmatsu Iida, Higashihiroshima-shi 739-0146
  • Telephone: 082-428-5099
  • Facsimile: 082-428-5154