About

Company Profile

Company name (Japanese)
株式会社メディアジーン
Company name (English)
Mediagene Inc.
Established
October 30, 1998
(transitioned to a holding company system on July 1, 2015)
Address

23-2 Maruyamacho, Shibuya-ku, Tokyo
150-0044 Arethusa Shibuya
Google Map
Representative
Director, Co-Founder: Motoko Imada
Directors
Director and Co-founder: Hiroto Kobayashi
Director: Hiroyuki Terao
Director: Aya Miyake
Director: Tatsuki Serizawa
Auditor: Toshihide Natori
Group Company
TNL Mediagene
Ltd. TNL Mediagene
Ltd. Infobahn
Capital
10 million yen *As of December 2, 2025

Management Team

 

Directors

Representative Director, Chief Executive Officer, Co-founder: Motoko Imada
Motoko Imada

Representative Director, Chief Executive Officer, Co-Founder

After working in editorial and international licensing in the publishing industry, she launched the Japanese edition of WIRED in 1994 and served as its business manager. In 1998, she founded Mediagene Inc., which now operates 17 brands, including Gizmodo Japan and Business Insider Japan. Following a business integration in 2023, she became President and COO of TNL Mediagene (Nasdaq: TNMG).

Director, Chief Visionary Officer, Co-founder: Hiroto Kobayashi
Hiroto Kobayashi

Director, Chief Visionary Officer, Co-Founder

Director CVO, Co-Founder He served as Editor-in-Chief of the Japanese edition of WIRED, launched in 1994, and co-founded the online media company Mediagene Inc. with Motoko Imada in 1998. As both a business leader and an editor with keen foresight, he explores visions for business and society. In addition to launching brands such as Gizmodo Japan, he is a pioneer in content marketing and owned media strategy. He also promotes open innovation and participates in public-private collaboration projects. His publications include After GAFA: A Map of the Decentralized World to Come (KADOKAWA), among others.

Director, Chief Financial Officer: Hiroyuki Terao
Hiroyuki Terao

Director, Chief Financial Officer

After working as a certified public accountant at an auditing firm, Hiroyuki became the Director of Finance at an operating company in 2015. After the company held an IPO, he joined Infobahn Group Inc. (now Mediagene Inc.) in 2017, became the Director and CFO, and has headed the company's business management since 2018.

Director, Chief Administrative Officer: Aya Miyake
Aya Miyake

Director, Chief Administrative Officer

At ASEAN-Japan Investment (now Japan Asia Investment Company, Limited), she was engaged in corporate valuation, capital policy planning, and listing support for startup companies. In 2012, she became the first female executive officer at Osaka Securities Exchange (now Japan Exchange Group, Inc.), the first female executive officer at a securities exchange in Japan.

Director, Chief Operating Officer: Itsuki Serizawa
Tatsuki Serizawa

Director, Chief Operating Officer

Infobahn in 2007 , he was involved in launching new media and developing new businesses.
In 2015, he was appointed Executive Officer and CSO of the former Mediagene , where he was in charge of the business strategy department.
he was appointed Director and CSO of the former Mediagene
In 2022, he was appointed Director and CSO of our company.

Vice President, Director and Manager

  • Media Editorial Department: Yuko Endo
    Yuko Endo

    Executive Officer,
    Media Editing Division

  • Media editorial department manager: Kazumi Oda
    Kazumi Oda

    Executive Officer,
    Media Editing Division

  • Media Editorial Department: Daisuke Kanazawa
    Daisuke Kanazawa

    Executive Officer
    in charge of Product Division

  • Media editorial department manager: Nozomi Takasaka
    Nozomi Kosaka

    Executive Officer,
    Media Editing Division

  • Legal, General Affairs, and Information Systems Department: Tomoyoshi Shiroguchi
    Tomoyoshi Shiroguchi

    Executive Officer
    in charge of Corporate Division

  • Public Relations and Human Resources: Kaori Sugiura
    Kaori Sugiura

    Executive Officer
    in charge of Corporate Division

  • Media editorial department manager: Kotaro Teshima
    Kotaro Teshima

    Executive Officer,
    Commerce Division

  • Media Editorial Department: Kei Togashi
    Kei Togashi

    Executive Officer,
    Media Planning Division

  • Media editorial department manager: Yu Ito
    Tamotsu Ito

    Executive Officer,
    Media Editing Department

  • Media Editor: Toru Nakamaru
    Toru Nakamaru

    Executive Officer,
    Media Editing Department

  • Media editorial department manager: Kei Nakamura
    Kei Nakamura

    Executive Officer,
    Commerce Division

Our History

_

October 1998 Infobahn Inc. (currently our company, capital of 45,000,000 yen) was established in Setagaya Ward, Tokyo. Started custom magazine solution business
May 1999 Started a media solution business
November 2003 Head office moved to Shibuya Ward, Tokyo
October 2004 New lifestyle magazine for women, "MYLOHAS," published (transferred to the web version in February 2006)
July 2006 Launched the Japanese edition of Gizmodo, “Gizmodo Japan”
February 2008 Established Mediagene Inc. in Shibuya Ward, Tokyo. "MYLOHAS" and " Gizmodo Japan " are transferred from Infobahn Inc. to Mediagene Inc.
July 2008 Launched the Japanese edition of Lifehacker, “Lifehacker Japan”
April 2012 Launched "Roomie"
September 2012 Infobahn Inc. has acquired the web solution business of cafeglobe.com, and Mediagene Inc. has acquired the company's media business (now Mashing Up ).
April 2014 Started advertising agency sales service
July 2015 Infobahn Inc. changed its name to Infobahn Group headquarters Inc., and established its wholly owned subsidiary, Infobahn Inc. through a company split, and moved to a holding company structure.
September 2015 Launched the Japanese edition of Digiday, “Digiday Japan”
November 2015 Launched purchase-based crowdfunding service site "Machi-ya".
January 2017 Launched the Japanese edition of Business Insider, “Business Insider Japan”
March 2018 Acquired “BOOK LAB TOKYO,” a physical venue operated by Labit Inc., which includes a cafe, bookstore, and event space.
March 2022 Infobahn Group headquarters Inc. merged with its subsidiary, the former Mediagene Inc., and changed its name to Mediagene Inc.
April 2023 Merged with The News Lens Co. through a share exchange with TNL Mediagene
May 2023 A share exchange with TNL Mediagene will result in the merger with The News Lens Co.
April 2024 The business is acquired from the news site " Sirabee ", operated by Newsy Inc.
October 2024 Signed a business partnership agreement with WOWOW
December 2024 Group holding company TNL Mediagene is listed on the NASDAQ market
June 2025 In collaboration with WOWOW, we have launched a joint promotion menu called " CoStory with WOWOW" on the social Commerce platform " CoStory ."

Access

Mediagene Inc.
| Mediagene Inc.

23-2 Maruyamacho, Shibuya-ku, Tokyo
150-0044 Aretusa Shibuya
GOOGLE MAP
1 minute walk from the south exit of Shinsen Station on the Keio Inokashira Line

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