Dentsu Japan Network

Dominant domestic Japan advertising network; the largest advertising group in Japan by revenue and media billings, operating through more than 100 group companies

Dentsu Japan Network (DJN) is the internal management company within Dentsu Group that governs and coordinates the full portfolio of Dentsu's Japan-based operating companies. This includes Dentsu Inc. (the core operating entity and Japan's dominant advertising agency), Dentsu Digital, Dentsu Soken (research and systems), Septeni Holdings (digital advertising and media), and Ignition Point (consulting and innovation), among more than 100 other domestic group companies. DJN functions as the strategic and administrative backbone for Dentsu's Japan business, distinct from Dentsu International, which manages the group's operations outside Japan. As the umbrella structure for Japan's largest advertising conglomerate, DJN oversees a vast range of services spanning traditional media buying, digital advertising, creative production, data analytics, marketing technology, public relations, and consulting. Dentsu Inc. alone commands a dominant share of Japan's advertising market, with deep relationships across television, print, digital, and out-of-home media. The network's scale gives it unmatched leverage with Japanese media owners and advertisers, and its integrated capabilities allow it to serve clients across the full marketing funnel. DJN's significance to the advertising and media industry in Japan cannot be overstated. Through its constituent companies, it touches virtually every major sector of Japanese advertising — from mass media planning and buying to performance digital marketing, marketing data infrastructure, and emerging areas such as influencer marketing and e-commerce advertising. The network's breadth and depth of domestic market penetration, combined with Dentsu Group's global reach via Dentsu International, positions DJN as a uniquely powerful force in both Japanese and global advertising.