Dentsu Japan Network

Dominant full-service advertising and marketing network in Japan, operating as the domestic arm of Dentsu Group Inc.

Dentsu Japan Network (DJN) serves as the organizational umbrella managing Dentsu's extensive portfolio of domestic Japan group companies, which includes Dentsu Inc. (the core operating company), Dentsu Digital, Dentsu Soken, Septeni Holdings, and Ignition Point, among many others. Established to streamline and coordinate the operations of over 100 group companies within Japan, DJN functions as a distinct in-house company separate from Dentsu International, which handles Dentsu's global ex-Japan business. This structure reflects Dentsu Group Inc.'s broader reorganization strategy to optimize its Japan-focused and international operations independently. Within Japan's advertising and marketing ecosystem, DJN holds a dominant market position, leveraging Dentsu's century-long heritage as Japan's largest advertising agency. The network provides a comprehensive suite of services spanning traditional media buying, digital advertising, data analytics, creative production, and integrated marketing communications. Key subsidiaries like Dentsu Digital focus on performance and digital marketing, while Dentsu Soken (formerly Dentsu Research Institute) contributes research and consulting capabilities, and Septeni Holdings strengthens the group's digital media and internet advertising footprint. DJN's significance in the AdTech ecosystem lies in its unparalleled scale and integration within the Japanese market, combining legacy media relationships with rapidly growing digital and data-driven capabilities. The network's ability to offer end-to-end marketing solutions — from strategy and creative to media planning, programmatic buying, and measurement — positions it as the preeminent full-service advertising and marketing group in Japan, serving major domestic and multinational brands operating in the region.