Keisei Densetsu Kogyo Co., Ltd.

Keisei Densetsu Kogyo Co., Ltd. (京成電設工業株式会社) is a Japanese electrical facilities engineering firm and a wholly owned subsidiary of Keisei Electric Railway, the core company of the Keisei Group. Headquartered in Yachiyodai-Higashi, Yachiyo City, Chiba Prefecture, the company was established on 1 May 1980 with capital of 50 million yen. Its business centres on the design support, construction and maintenance of railway electrical installations — including train line (trolley) works, power receiving and transforming substations, signalling and safety equipment, and telecommunications — alongside general electrical and communication facilities work for commercial buildings, housing and public facilities. Within the Keisei Group, Keisei Densetsu Kogyo functions as the group's dedicated electrical works contractor. Its main customers include Keisei Electric Railway, Kanto Railway, Hokuso Railway, Toyo Rapid Railway, Shibayama Railway, Tobu Railway and Keisei Construction, as well as Chiba Prefecture and Yachiyo City. The company describes its service model as an integrated "design support + construction + maintenance" system, and it holds a range of Chiba Prefectural Governor construction business licences covering electrical works, telecommunications, painting, plumbing, fire facility works, building and civil engineering, and — acquired in September 2024 — machinery and equipment installation works. As of December 2024 the company employed 91 people. Its stated corporate philosophy is to deliver high-quality products that satisfy customers through reliable engineering and construction management, contributing to customers and the local community. Its corporate motto is "Make everyone smile," and its slogan is "Challenge! Toward a shining future." The company is led by President and Representative Director Daisuke Kobayashi. It actively recruits mid-career and new-graduate staff, advertising positions such as architectural construction management and station platform door installation management, and it supports employees in obtaining required national qualifications. It also recruits partner subcontractors. Keisei Densetsu Kogyo is a relatively small but strategically important infrastructure contractor within the Keisei Group, positioned to benefit from railway safety investment such as platform screen door installation and from the broader electrification and digitalization of social infrastructure.

Keisei Densetsu Kogyo Co., Ltd. was established on 1 May 1980 as an electrical facilities engineering company within the Keisei Group, the railway-centred corporate group built around Keisei Electric Railway in the Greater Tokyo and Chiba region. It was set up with capital of 50 million yen and is wholly owned by Keisei Electric Railway. Its head office is located at 1-45-3 Yachiyodai-Higashi, Yachiyo City, Chiba Prefecture. From its founding, the company's core business has been the design support, construction and maintenance of railway electrical installations for the Keisei Group and its affiliates. Its customer base has grown to include Keisei Electric Railway, Kanto Railway, Hokuso Railway, Toyo Rapid Railway, Shibayama Railway and Tobu Railway, as well as Keisei Construction and other Keisei Group companies, and public bodies such as Chiba Prefecture and Yachiyo City. Alongside railway work, it undertakes general electrical and communication facilities construction for commercial facilities, housing and public buildings. The company holds multiple Chiba Prefectural Governor construction business licences. These cover electrical works and telecommunications works (special licence, 特－1, No. 16844), painting and plumbing works (general, 般－4), fire facility works (general, 般－2), building and civil engineering and 18 other categories (special, 特－4), and — acquired on 24 September 2024 — machinery and equipment installation works (general, 般－6). In recent years the company has emphasised railway safety investment, including station platform door installation, and has recruited construction management staff for such projects. It has also aligned with group-wide governance initiatives, adopting the Keisei Group Policy on Customer Harassment on 31 October 2024. As of December 2024 it employed 91 people. The company is led by President and Representative Director Daisuke Kobayashi, who has spoken about the accelerating pace of change in the electrical equipment field driven by renewable energy and digitalization, and about the importance of human resources and a culture of mutual learning. Its corporate philosophy stresses contributing to customers and the local community through reliable engineering and construction management, under the motto "Make everyone smile" and the slogan "Challenge! Toward a shining future."

• Company established with capital of 50 million yen as a Keisei Group electrical facilities engineering firm.

• Obtained Chiba Prefectural Governor construction business licence for machinery and equipment installation works.

• Formulated the Keisei Group Policy on Customer Harassment.

• Employee count stood at 91.

• Posted job openings for architectural construction management and station platform door installation management on Mynavi Tenshoku.

The Keisei Group's dedicated electrical facilities engineering contractor, offering an integrated design-support, construction and maintenance service for railway and general electrical infrastructure.

• Railway electrical equipment works

  Design support, construction and maintenance of railway electrical installations including train line and substation works.

• Railway signalling and communication equipment works

  Signalling safety equipment and telecommunications works for railway operators.

• General electrical and communication facilities works

  Electrical and communication facilities construction for commercial facilities, housing and public buildings.

1. 1京成電設工業株式会社 公式サイトkeidenko.co.jp
2. 2会社情報｜京成電設工業株式会社keidenko.co.jp
3. 3京成電設工業 - Wikipediaja.wikipedia.org
4. 4Keisei Densetsu Kogyo - Wikidatawikidata.org