Founded in October 1990 by founder Mamoru Shichimura, established Sub & Liminal Inc. and expanded into human resource recruitment consulting.
Founder Mamoru Nanmura established Sub & Liminal Co., Ltd., the predecessor of Septeni Holdings Co., Ltd., and developed a human resource recruitment consulting business.
Started human resource consulting business.
Started recruiting new graduates.
Started the DM business (direct mail dispatch agency) in 1993, establishing the foundation of the Septeni Group.
Started the DM business (direct mail dispatch agency) in 1993.
Started DM business.
Started internet advertising business.
Changed company name to Septeni Co., Ltd.
Listed on the JASDAQ market.
Established Osaka Sales Office (now Septeni Kansai Branch Co., Ltd.).
Made Tricorn Co., Ltd. a subsidiary.
Established Septeni Crossgate Co., Ltd.
Transitioned to a holding company structure and changed the company name to Septeni Holdings Co., Ltd.
Transferred internet advertising business to Septeni Inc. through a spin-off, and transferred DM business to Septeni Direct Marketing Inc. through an absorption-type split.
Made a third-party allotment of shares to Yahoo Japan Corporation.
Established MANGO Inc.
Established High Score Inc.
Launched Facebook-related services.
Started overseas expansion in internet advertising business.
Established Septeni Asia Pacific Pte. Ltd. in Singapore
Established Septeni America, Inc. in San Francisco
In 2013, launched the IP platform business (formerly: manga content business), which involves planning and developing proprietary IP (intellectual property).
In 2013, launched the IP platform business (formerly: manga content business), which involves planning and developing proprietary IP (intellectual property).
Founded Comicsmart Inc. and launched the IP platform business (formerly: Manga Content Business)
Established Vivibit Inc.
Sold the DM business
Founded gooddo Inc.
Voluntary adoption of International Financial Reporting Standards (IFRS)
Opened a sales office in Beijing
Emerging Market Ranking 4th
Founded TowaStela Inc.
Acquired shares of Lion Digital Global LTD through Septeni Asia Pacific Pte. Ltd. and made it a subsidiary
Applied International Financial Reporting Standards (IFRS) from the fiscal year ending September 2016.
Applied International Financial Reporting Standards (IFRS) from the fiscal year ending September 2016.
Emerging Market Ranking 5th
Founded Septeni Ad Creative Inc.
Founded Delight Tube Inc.
Emerging Market Ranking 6th
Founded Milogos Inc.
Founded Signco Inc.
Entered a capital and business alliance agreement with Dentsu Inc. (now Dentsu Group Inc.)
Since January 2019, has been promoting a business alliance with Dentsu Group.
Emerging Market Ranking 3rd
Since January 2019, has been promoting a business alliance with Dentsu Group, accelerating group growth through organic business growth and this partnership.
Founded Septeni Incubator
Emerging Market Ranking 1st
Founded PERF Inc.
Founded LIVAND Inc.
Founded Alphabull Inc.
Founded Septeni Data Solutions Inc.
Established Human Resources Asset Research Institute Inc.
Established Qzil.la Inc.
Made a subsidiary of Dentsu Group Inc.
Made Dentsu Direct Inc. a subsidiary
Made Dentsu Digital Inc. an equity-method affiliate
Mr. Mitsunori Sato, who served as the company's representative director until 2023, has started an internet advertising business as a new venture.
Established 3RD GEAR Inc.
Aiming for further growth under a new management system with the mid-term theme of 'Focus & Synergy' in 2024.
From 2024 to 2025, with the mid-term theme of "Focus & Synergy," aiming for further growth under a new management system. Under the leadership of newly appointed President Yuichi Kannno, the company aims to shift to a group leadership system, focusing on existing businesses centered on digital marketing, and creating "synergy" within the group, within businesses, and between businesses.
Change of representative director and renewal of management system
Made Comicsmart Inc. an equity-method affiliate
In 2026, formulated and announced a new mid-term management plan aiming for VISION 2030 'VALUE MAXIMIZER'.
Aiming for VISION 2030 "VALUE MAXIMIZER" in 2026, formulating a new mid-term management plan. To generate an operating profit of 10 billion yen by 2030 and become a company that balances high growth and high returns, the company has formulated and announced a mid-term management plan for FY2026-2028 toward VISION 2030. The company will deepen and explore its businesses, aiming to be a partner that enhances corporate value for customers.
Septeni, a consolidated subsidiary of Septeni Holdings, received the "Vertical New Hero" award in the Real Estate category of the "Strategic Sales" category at the Meta Agency First Awards Japan 2026, co-hosted by Meta, alongside Prime Cross. Additionally, it won the Silver "Brand Impact" award in the "Creative of the Year" category that same year.
Septeni Holdings completed its acquisition of all shares of Mediahouse Holdings, effective November 4, 2026. The companies plan to collaborate in HR marketing and digital marketing, bringing together two companies certified as Indeed Platinum Partners.
Septeni Holdings acquired all shares of Media House Holdings Inc. The two companies will establish a collaborative framework and promote integrated group efforts in HR marketing and digital marketing.
Septeni Holdings received the Grand Prize at the Digital HR Competition 2026. Their year‑round recruitment initiative utilizing digital marketing and people analytics was praised as an innovative system that simultaneously improves the quality of talent and reduces recruitment costs.
Septeni Holdings entered into a share transfer agreement with Media House Holdings and is proceeding to make it a subsidiary. The move aims to strengthen its presence in the HR and digital marketing markets.
Septeni Holdings entered into an agreement to acquire shares in Media House Holdings Co., Ltd. and make it a consolidated subsidiary. The companies aim to strengthen their presence in the HR and digital marketing markets through synergies.
Delight Tube Inc. has launched a service to develop AI agents that automate content review in accordance with company-specific rules and laws. After a three-month proof of concept, customers can have a dedicated review AI developed to improve marketing efficiency while maintaining content quality. The initiative addresses the diversification of digital content and increasingly stringent regulations.
Septeni and Delight Tube have entered into a business alliance with Faber Company to strengthen SEO and GEO measures in response to changes in the search market and to improve the execution capability of the 'MXONE' marketing concept.
Septeni, a subsidiary of Septeni Holdings Inc., received the Top Sales Award and the Best Growth Award in the FY2025 second half of the Indeed Certified Partner Program.
Septeni Co., Ltd. received double awards in the Platinum category of the Indeed Certified Partner program for the second half of FY2025: the "Overall Sales Award" and the "Best Growth Award".