Denkishoin

Denkishoin (電気書院) is a Japanese publishing house headquartered in Chiyoda, Tokyo, specializing in books and magazines for electrical engineering and related technical fields. It was founded in Osaka in March 1933, when it began publishing the monthly magazine Denki Keisan (電気計算) and offering correspondence education. The company was incorporated in June 1952 and moved its head office to Kyoto, then relocated to Tokyo in November 1964. In November 1977 it launched another monthly magazine, Kōji to Juken (工事と受験). Denkishoin's catalog covers qualification exam preparation, professional and academic books in electrical, electronic, mechanical, environmental, chemical, biological, information/AI, civil engineering/architecture, mathematics/physics, and welfare/medical fields, as well as general interest titles. Its flagship periodical, Denki Keisan, has been published since 1933 and marked its 90th anniversary in 2022. The magazine provides exam information and study courses for certifications such as the Third-Class and Second-Class Chief Electrical Engineer (Denken 3 and Denken 2) and the Energy Manager examination, alongside feature articles on the latest electrical technologies. The company also publishes the JEC standards series and the Denki Gakkai BOOKs. In April 2022, Denkishoin launched Denkishoin E+ Academy, an LMS-based online learning service for qualification exam preparation, including for chief electrical engineers. The publisher is a member of the Japan Association of Natural Science Publishers (自然科学書協会). It remains a private company and continues to release new titles, e-books, and exam answer keys through its website and social media channels.

Denkishoin was established in March 1933 in Osaka, where it began publishing the monthly magazine Denki Keisan and providing correspondence education. The magazine was founded with the aim of producing high-quality electrical engineers and broadly disseminating the latest electrical technology. In June 1952, the company moved its head office to Nakagyo Ward, Kyoto, and was incorporated as a stock company. In November 1964, the head office was relocated to Tokyo. In November 1977, the company launched another monthly magazine, Kōji to Juken (工事と受験). Over the decades, Denkishoin built a catalog centered on electrical engineering, expanding into qualification exam preparation for chief electrical engineers, electrical work specialists, fire protection equipment engineers, quality control (QC) certification, mathematics certification, and other fields, as well as professional and academic books in electrical, electronic, mechanical, environmental, chemical, biological, information/AI, civil engineering/architecture, mathematics/physics, and welfare/medical categories. It also publishes the JEC standards series and the Denki Gakkai BOOKs. The company is a member of the Japan Association of Natural Science Publishers. In April 2022, Denkishoin launched Denkishoin E+ Academy, an LMS-based online learning service for qualification exam preparation, including for chief electrical engineers. In 2022, the monthly magazine Denki Keisan celebrated its 90th anniversary since its founding in 1933. The publisher continues to release new titles, e-books, and exam answer keys, and maintains a presence on YouTube, Facebook, and X.

• Founded in Osaka; begins publishing the monthly magazine Denki Keisan and offering correspondence education.

• Head office moved to Nakagyo Ward, Kyoto; company incorporated as a stock company.

• Head office relocated to Tokyo.

• Launched the monthly magazine Kōji to Juken (工事と受験).

• Opened Denkishoin E+ Academy, an LMS-based online learning service for qualification exam preparation.

• Monthly magazine Denki Keisan celebrated its 90th anniversary since its 1933 founding.

A specialist publisher for electrical engineers and licensing exam candidates, combining technical books, exam preparation materials, and a long-running monthly magazine.

• Monthly magazine Denki Keisan (電気計算)

  Flagship monthly magazine founded in 1933, covering electrical engineering technology, exam information and study courses for Denken and Energy Manager certifications.

• Denken 3 past exam question collections (2026-2027 edition)

  Collections of past exam questions for the Third-Class Chief Electrical Engineer certification, covering law, machinery, power, and theory.

• Denkishoin E+ Academy

  LMS-based online learning service launched in April 2022 for qualification exam preparation, including for chief electrical engineers.

• JEC standards publications

  Standards documents such as JEC-2310 on AC circuit breakers and earthing switches.

• Professional and academic books

  Books in electrical, electronic, mechanical, environmental, chemical, biological, information/AI, civil engineering/architecture, mathematics/physics, and welfare/medical fields.

1. 1電気書院 official websitedenkishoin.co.jp
2. 2電気書院 - Wikipedia (Japanese)ja.wikipedia.org
3. 3Denkishoin - Wikidatawikidata.org
4. 4電気書院denkishoin.co.jp
5. 5電気書院denkishoin.co.jp
6. 6電気書院denkishoin.co.jp