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Chiyoda Construction Co., Ltd.

千代田工営株式会社
Ticker
—
Listed market
—
Country
Japan
Employees (non-consolidated)
90
Related companies
2
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Basic information

BASIC
Head office
940 Kamikoma, Omiya-ku, Saitama City, Saitama Prefecture, 330-0855, Japan
Chief executive
Koji Yoshida
Capital
100,000,000
Employees (non-consolidated)
90 people
Employees (consolidated)
Start date
End date
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Websites

1 DOMAINS
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Business

3
Foundation pile design and constructionVarious surveys and countermeasure worksPile construction
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Related companies

2 COMPANIES
Company name Group Parent Subsidiary Customer Supplier Alliance Bank Shareholder
JFE Steel Corporation
Alliance
児玉コンクリー ト工業株式会社
Alliance
Names without a link are companies not yet registered in OpenBizGraph
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Network

NETWORK
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History

19 EVENTS

Founded Yoshida Foundation as a specialized foundation pile construction companySources

Established Yoshida Foundation Co., Ltd.Sources

Renamed to Chiyoda Foundation Co., Ltd.Sources

Renamed to Chiyoda Construction Co., Ltd.Sources

Development of screw pile methodSources

Developed the rotating penetration method for winged steel pipe piles (screw piles) as foundation piles for detached houses.Sources

Obtained ministerial certification for the screw pile EAZET method.Sources

Opened Tokyo office.Sources

Co-developed the Tsubasa pile with JFE Steel Co., Ltd.Sources

Obtained ministerial certification for the T-Wing4 pile method.Sources

Opened Osaka office.Sources

Obtained ministerial certification for the K-WingZ pile method.Sources

Obtained inspection certificate for the screw pile EAZET method.Sources

Opened Hiroshima office.Sources

Co-developed the non-welded connector 'Tsuitarō'.Sources

Obtained ministerial certification for the SCH (Soil Cement Hybrid) pile method.Sources

Started a business partnership with Kodama Concrete Industry Co., Ltd.Sources

K·WingZ pile / T·W ing pile registered as a Saitama Prefecture productSources

Opened Ibaraki officeSources

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News

10 ARTICLES

Participated in Prefecture Products Fair 2026Sources

Chiyoda Kōei Co., Ltd. exhibited at the "Saitama Prefecture Construction Materials Prefecture Products Fair 2026" held on October 21-22, 2026. They introduced their technology and products, and at the venue, Governor Ono of Saitama Prefecture visited their booth to learn about their initiatives and products. They plan to continue to disseminate technology and products through exhibitions and other events, contributing to the development of the local construction industry and the improvement of social infrastructure.

Ongoing Donation to Shine On! KidsSources

Our company agreed with the mission of Shine On! Kids and continued to make donations. The organization provides a "heart care" program that supports children and families fighting pediatric cancer and serious illnesses, and also engages in facility dog activities. Our company will continue to support activities that help secure the future of children.

New Headquarters Completed and Operations CommencedSources

Chiyoda Kōei Co., Ltd. began operations at its new headquarters in August of Reiwa 8 (2026) following the completion of the new headquarters building. The company has created an environment that enables employees to work comfortably and communicate smoothly, and provides a reassuring space for visiting customers. The company aims to continue being a trusted enterprise for its customers.

Introducing Posters Created by Students of Ageo High School's Regular ProgramSources

On June 16, 2026, Chiyoda Construction carried out an extracurricular internship class for first- and second-year students of Ageo High School's regular program. The students observed and experienced activities such as piling, heavy machinery, and welding, and also interacted with young employees. Posters created by the students expressing the appeal of the company as perceived through their workplace experience are presented.

Corporate Hometown Tax Donation to Mito CitySources

Chiyoda Kōei Co., Ltd. donated using the corporate version of the hometown tax donation to Mito City's "Project to Enhance Art Education in Collaboration with the Art Museum". They say they support Mito City's regional revitalization and contribute to realizing a sustainable society.

Participated in the Omiya Industrial High School Career FairSources

Chiyoda Kōei Co., Ltd. participated in the Omiya Industrial High School Career Fair (corporate information session) organized by the Saitama Prefecture Business Owners Association. On that day, we interacted with many high school students and informed them that we are continuously recruiting for company tours and internships. Inquiries are handled by Mr. Tajima from the General Affairs Department.

Delivery of DHJ15 pile driverSources

On February 14, 2025, the DHJ15 pile driver was delivered. This is the second delivery of this model by the company. The company owns several pile drivers ranging from the DHJ08 to the DHJ35 models manufactured by Nihon Jidoki Seisakusho, and it claims to leverage its experience and technical capabilities to propose solutions tailored to customer requests and site conditions.

Donation to Shine On! KidsSources

Our company agreed with the purpose of the activity and donated to Shine On! Kids. The organization provides emotional care for children and families fighting childhood cancer and serious illnesses. The news introduced the activities of a facility dog that works full-time at the hospital as part of the medical team, and our company stated that it will continue to support activities that help children grow and build their future.

Investment in Saitama Prefecture Sustainability BondSources

Chiyoda Kōei Co., Ltd. announced that it has invested in the "Saitama Prefecture 3rd Public Bond (Sustainability Bond – 10 years)" issued by Saitama Prefecture. The funds raised will be allocated to projects related to environmental and social issues, such as flood and landslide control, forest conservation, disaster prevention system development, child abuse prevention, and promotion of school education. This bond is said to align with the characteristics of ICMA sustainability bonds and has obtained a second-party opinion from a third-party organization.

Certified as a 'Diverse Working Style Practice Company'Sources

Chiyoda Kōei Co., Ltd. received the highest Platinum certification in Saitama Prefecture's 'Diverse Working Style Practice Company' system. The company will continue to pursue employee happiness and advance the creation of a more work-friendly environment.

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Sources & updates

SOURCES
DOMAINOwn domain：Yes
UPDATED2026-10-30 18:37 · Model: GPT-6 Luna
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