These Japanese companies are primarily large and mid-sized firms in advertising, IT services, and digital marketing. dentsu, with nearly 20,000 employees, specializes in connecting brands with content and commerce. AnyMind Group, founded in 2016, offers an end-to-end commerce enablement platform. transcosmos inc., established in 1966, provides digital transformation and e-commerce solutions globally. Hakuhodo Inc., founded in 1895, is a global advertising and communication agency focusing on consumer insight and creativity. CyberAgent, Inc. is an internet company focusing on media, internet advertising, games, and investment development. Whatever Co. is an international creative agency formed in 2019.
A clear pattern is the concentration of headquarters in Tokyo, particularly within the Minato-ku, Shibuya, and Toshima-ku districts. This indicates a geographical clustering of these large marketing and IT services firms within the capital.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
dentsudentsu.com
Helping brands predict future opportunities and create growth paths by connecting brand, content, commerce, and experience with creativity. |
19,298 | |||
| 2 |
AnyMind Groupanymindgroup.com
An end-to-end commerce enablement platform providing a wide range of tools for businesses, publishers, and influencers to drive next-generation commerce globally |
9,204 | |||
| 3 |
transcosmos inc.trans-cosmos.co.jp
It provides cost reduction and sales expansion services, focusing on digital transformation and e-commerce solutions across 32 countries globally. |
7,159 | |||
| 4 |
dentsu Japandentsu.co.jp
A network of over 160 group companies in Japan offering services in advertising, business, customer experience, and digital transformations to support client growth |
3,855 | |||
| 5 |
CyberAgent, Inc.cyberagent.co.jp
A pioneering internet company founded in 1998, focusing on media, internet advertising, games, and investment development to become the leading company of the 21st century |
1,839 | |||
| 6 |
Hakuhodo Inc.hakuhodo.co.jp
Founded in 1895, a global advertising and communication agency with a focus on consumer insight and creativity, operating in 17 countries |
1,583 | |||
| 7 | 1,495 | ||||
| 8 |
Dentsu Digitaldentsudigital.co.jp
Leading provider of digital marketing services in Japan, offering strategy, development, and execution of next-gen marketing and IT platforms, along with DX consulting for business innovation |
930 | |||
| 9 |
Whatever Co.whatever.co
An international creative agency formed in 2019 merging Japanese production company dot by dot, and creative agencies in New York, Taipei, and Berlin |
833 | |||
| 10 | 740 | ||||
| 11 |
Nikkei Business Publicationsnikkeibp.co.jp
A company based in Tokyo, Japan, focused on providing services or products related to the address mentioned in Minato-ku, Toranomon |
588 | |||
| 12 |
株式会社ベクトル Vector Inc.vectorinc.co.jp
A leading digital PR agency in Japan and Asia, offering services such as digital marketing, programmatic branding, video ads, talent casting, and media services |
553 | |||
| 13 |
株式会社メンバーズ／Members Co.,Ltdmembers.co.jp
Facilitating companies in advancing their decarbonization digital transformation through operational support in digital business Visit website for more information |
527 | |||
| 14 |
AQaqworks.com
A team of designers, developers, and researchers creating products to empower individuals in learning and accomplishing great things globally Founded in Tokyo, now based in Paris |
475 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 15 | 450 | ||||
| 16 |
Adways Inc.adways.net
A Tokyo Stock Exchange listed company offering affiliate services, ad distribution for smartphones, marketing platform UNICORN, and media content development worldwide |
397 | |||
| 17 |
株式会社クリーク･アンド･リバー社cri.co.jp
A professional agency specializing in various fields like TV, games, web, art, medical, IT, legal, fashion, and agriculture, providing job opportunities, projects, and copyright monetization |
390 | |||
| 18 |
TBWA HAKUHODOtbwahakuhodo.co.jp
A Tokyo-based advertising agency utilizing the DISRUPTION® methodology to create impactful solutions that challenge conventional thinking and drive change |
339 | |||
| 19 | 255 | ||||
| 20 | 254 | ||||
| 21 |
IREP Co., Ltd.irep.co.jp
A leading digital marketing agency in Japan offering services such as SEO, SEM, web analytics, LPO, and mobile app marketing to improve client sales and ROI |
216 | |||
| 22 |
Zenken株式会社／Zenken Corporationzenken.co.jp
A company based in Tokyo, Japan, located in Shinjuku Sentral Park Tower, offering services in a specific industry or field |
195 | |||
| 23 |
株式会社グッドパッチgoodpatch.com
An independent design company collaborating with global partners to solve complex problems with a human-centered approach, offering UX/UI design, app development, and organizational design services |
190 | |||
| 24 |
Active Gaming Mediaactivegamingmedia.com
AGM specializes in publishing and supporting digital content for European, American, and Asian markets, with a focus on indie games, anime, and manga |
186 | |||
| 25 |
Mitsue-Links Co.,Ltd.mitsue.co.jp
Leading communication design company in Japan, specializing in digital content solutions for marketing, branding, website construction, system development, and analytics to drive sustainable development |
185 | |||
| 26 |
株式会社乃村工藝社 Nomura Co., Ltd.nomurakougei.co.jp
An interior design and engineering services provider that has been creating spaces for people to gather since 1892 in Japan |
181 | |||
| 27 |
MATCHAcompany.matcha-jp.com
An inbound media company showcasing the charms of Japan to the world, preserving valuable culture for future generations |
43 | |||
| 28 |
SUNNY SIDE UP Inc. (Please follow the new one!)linkedin.com
PR agency with 30 years of experience managing top athletes and global brands in Japan, creating buzz and helping them succeed domestically and internationally |
17 | |||
| 29 |
Rhizomatiksrhizomatiks.com
A company that provides high-quality solutions and services with a focus on customer satisfaction and professionalism |
16 | |||
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
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