SE Holdings and Incubations Co.,Ltd.

SE Holdings and Incubations Co.,Ltd. (SE H&I) is a Japanese pure holding company headquartered in Shinjuku, Tokyo. It was established in December 1985 as Kabushiki Kaisha Shoisha (株式会社翔泳社), originally producing computer software manuals on a contract basis. Over the following decades the company expanded into computer book publishing, design, game development, IT education, e-commerce and web media. In October 2006 it changed its name to SE Holdings and Incubations Co.,Ltd. and, through a company split, transitioned to a pure holding company structure. The publishing business was succeeded by the newly established Shoisha Co., Ltd. The group's principal subsidiaries include Shoisha Co., Ltd. (publishing and web media), SE Design Co., Ltd. (design), SE Mobile and Online Co., Ltd. (mobile and online services), SE Plus Co., Ltd. (IT education and job placement), and SE Investment Co., Ltd. (securities investment). The group describes itself as an enterprise group aiming to contribute to society while growing itself by actively contributing to the growth of markets including the information industry. SE H&I is listed on the Tokyo Stock Exchange Standard Market, having moved there in April 2022 following the exchange's market restructuring. Its shares were originally registered over-the-counter with the Japan Securities Dealers Association in September 1998, then listed on JASDAQ in December 2004, and later moved to the Tokyo Stock Exchange JASDAQ Standard in July 2013. The company's capital stood at 1,534,457 thousand yen as of March 31, 2026, with 270 consolidated employees and 6 standalone employees. The representative director and president is Koji Hayami. The group's publishing arm, Shoisha, is known for computer and IT-related books and magazines, as well as translated general non-fiction such as Graham Hancock's "Fingerprints of the Gods" and Theo Colborn's "Our Stolen Future." It also operates a family of web magazines including CodeZine, MarkeZine, EnterpriseZine, Biz/Zine, ECzine, EdTechZine, SalesZine, CreatorZine, HRzine and ProductZine, and hosts IT conferences such as Developers Summit. SE Plus provides IT education and job placement services, including e-learning and certification preparation. SE Mobile and Online develops games and mobile content, and launched the online matchmaking service "Smarriage" in June 2019.

SE Holdings and Incubations Co.,Ltd. traces its origins to December 1985, when Kabushiki Kaisha Shoisha was established in Kojimachi, Chiyoda-ku, Tokyo, with capital of 20 million yen, starting a contract business producing computer software manuals. In March 1987 the company obtained a book distribution account and published "Japanese Windows Programmers Guide," entering the computer book publishing business. In April 1988 it began package design, brand design, CI and spatial design services for IT-related companies. The headquarters moved to Jingumae, Shibuya-ku in December 1992. In 1993 the company published "Windows API Bible 1" and expanded its programming specialty books. In April 1995 it started a general book business (translated non-fiction, etc.) and launched the magazine "Visual Basic Magazine," and also established a game development division. In January 1996 it published Graham Hancock's "Fingerprints of the Gods," a bestseller of about 2.25 million copies. In July 1998 the headquarters moved to Funamachi, Shinjuku-ku, integrating all departments; the company launched the EXAM PRESS series and expanded certification exam preparation books. In September 1998 its shares were registered over-the-counter with the Japan Securities Dealers Association. In December 1998 it co-hosted the Visual C++ conference "VCDC JAPAN" with U.S. TPD, starting a conference and seminar business. In April 1999 the game development division was reorganized into the software solution division, and the company began general system contracting and mobile phone software development. In July 1999 it opened the IT engineer e-commerce site "SEshop.com" and published "Introduction to Net Business Strategy," entering the business book field. In October 1999 it began providing services including the official search engine "EZ Search" for KDDI's mobile internet service "EZweb." In December 2000 it began selling the e-learning service "Dokushu Zemi," using its own books as texts. In July 2001 it published "The Innovator's Dilemma" as the first in the HARVARD BUSINESS SCHOOL PRESS series. In November 2001 it established Shoisha Jinzai Center Co., Ltd. (now SE Plus Co., Ltd.) to operate IT-related job placement services. In February 2003 it began regularly holding the IT developer seminar event "Developers Summit." In December 2004 it cancelled its over-the-counter registration with the Japan Securities Dealers Association and listed its shares on the JASDAQ Securities Exchange. In June 2005 it opened "CodeZine," a web magazine for system developers. In July 2006 it opened "MarkeZine," a practical web magazine for online marketing. In October 2006 it changed its name to SE Holdings and Incubations Co.,Ltd. and, through a company split, transitioned to a pure holding company, with Shoisha Co., Ltd., SE Design Co., Ltd., SE Mobile and Online Co., Ltd., and Game Goose Co., Ltd. succeeding the businesses. In July 2007 Shoisha opened "EnterpriseZine," a practical web magazine for IT professionals. In December 2007 Shoisha began providing news content from its web media "MarkeZine" and "MONEYzine" to Yahoo! News. In April 2011 it established SE Investment Co., Ltd. to conduct securities investment. In April 2013 SE Plus began opening various job sites for co-medical professionals. In November 2013 Shoisha opened "ECzine," a media outlet providing information on e-commerce. In November 2014 Shoisha opened "Biz/Zine," a business media outlet themed on corporate innovation. In May 2016 Shoisha published the "Ruby's Adventure" series, a world best-selling educational picture book for programming education. In April 2017 Shoisha opened "EdTechZine," a media outlet for educational ICT utilizing technology. In August 2018 SE Design was certified as a HubSpot Gold Partner. In April 2019 Shoisha opened "SalesZine," a media outlet supporting corporate sales activities themed on sales x technology. In June 2019 SE Mobile and Online released the online matchmaking support service "Smarriage." In January 2021 it opened the "SE Plus IT Education Channel [Official]" on YouTube. In April 2022, with the transition to the Tokyo Stock Exchange's new market segments, it listed on the Standard Market. In March 2023 SE Plus was certified under the Ministry of Health, Labour and Welfare's commissioned project as a "provider of appropriate fee-charging employment placement services in the medical, nursing care and childcare fields."

• Established Shoisha Co., Ltd. in Kojimachi, Chiyoda-ku, Tokyo, with capital of 20 million yen; began contract production of computer software manuals.

• Obtained a book distribution account; published "Japanese Windows Programmers Guide" and entered computer book publishing.

• Began package design, brand design, CI and spatial design services for IT-related companies.

• Moved headquarters to Jingumae, Shibuya-ku, Tokyo.

• Established game development division and began game development business.

• Published Graham Hancock's "Fingerprints of the Gods," a bestseller of about 2.25 million copies.

• Moved headquarters to Funamachi, Shinjuku-ku, integrating all departments; launched EXAM PRESS series.

• Registered shares over-the-counter with the Japan Securities Dealers Association.

• Opened IT engineer e-commerce site "SEshop.com".

• Began selling e-learning service "Dokushu Zemi" using its own books as texts.

• Established Shoisha Jinzai Center Co., Ltd. (now SE Plus Co., Ltd.) for IT-related job placement.

• Began regularly holding the IT developer seminar event "Developers Summit".

• Cancelled over-the-counter registration and listed shares on the JASDAQ Securities Exchange.

• Opened web magazine "CodeZine" for system developers.

• Opened web magazine "MarkeZine" for online marketing.

• Changed name to SE Holdings and Incubations Co.,Ltd. and transitioned to a pure holding company via company split.

• Shoisha opened "EnterpriseZine" web magazine for IT professionals.

• Established SE Investment Co., Ltd. for securities investment.

• Shoisha opened "ECzine" media for e-commerce information.

• Shoisha opened "Biz/Zine" business media themed on corporate innovation.

• Shoisha published the "Ruby's Adventure" series of educational picture books for programming education.

• Shoisha opened "EdTechZine" media for educational ICT.

• SE Design certified as HubSpot Gold Partner.

• Shoisha opened "SalesZine" media supporting corporate sales activities.

A pure holding company contributing to the growth of the information industry and related markets while growing itself.

• CodeZine

  Web magazine for developers focused on implementation.

• MarkeZine

  Practical web magazine for online marketing.

• EnterpriseZine

  Web magazine for IT professionals in enterprise system construction.

• Biz/Zine

  Media for business developers.

• ECzine

  Media supporting commerce business.

• EdTechZine

  Specialized media for educational ICT.

• SalesZine

  Web magazine for sales support through technology.

• CreatorZine

  Web media for creators.

• HRzine

  Web media for HR departments and professionals.

• ProductZine

  Web media for product managers.

• Developers Summit

  Comprehensive IT conference born from collaboration with the engineer community.

• MarkeZine Day

  Marketing event to enjoy tech and creativity.

• EnterpriseZine Day

  Event for IT workers (formerly IT Initiative Day).

• Smarriage

  Online matchmaking support service released by SE Mobile and Online in June 2019.

1. 1SE Holdings and Incubations Group official websitesehi.co.jp
2. 2沿革 – SE Holdings and Incubations Groupsehi.co.jp
3. 3会社情報 – SE Holdings and Incubations Groupsehi.co.jp
4. 4アクセスマップ – SE Holdings and Incubations Groupsehi.co.jp
5. 5翔泳社 - Wikipedia (Japanese)ja.wikipedia.org
6. 6SE Holdings and Incubations Co.,Ltd. - Wikidatawikidata.org