CARTA HOLDINGS

CARTA HOLDINGS operates a hybrid adtech and marketing services model. It develops and runs proprietary advertising platforms for programmatic buying and integrated campaign execution, then layers managed services on top for advertisers and agencies that want outsourced operations. In parallel, it owns consumer-facing media or commerce properties that generate audience data, ad inventory, and affiliate commerce revenue. Value is created by combining software, media access, operational execution, and ecosystem relationships within the Japanese advertising market.

CARTA HOLDINGS is a Japan-based digital advertising and marketing group operating proprietary adtech platforms, managed advertising operations, and selected media or commerce properties. Its core capabilities centre on programmatic media buying, cross-channel campaign execution, and advertiser-facing platforms such as PORTO DSP and related brand advertising solutions. The company primarily serves advertisers, agencies, and enterprise marketers in Japan, with particular strength in mobile and digital media execution.

The business makes money through a hybrid mix of platform economics and service revenue. It earns platform-related income from programmatic media buying and advertising technology usage, service fees from campaign operations and optimisation, and monetisation from owned media or commerce assets through advertising inventory and affiliate activity. Financially and strategically, the company sits within a more complex ownership structure following NTT DOCOMO's 2025 tender offer and the conversion of CARTA into a joint venture with Dentsu.