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Index Exchange Partners with Dentsu Japan International Brands to Launch Omnichannel Marketplace 

Strategic partnership empowers marketers with direct access to premium media inventory

Index Exchange Inc. (Index), one of the world’s largest independent supply-side platforms (SSPs), and dentsu Japan international brands* (DJIB), today announced a partnership. The collaboration leverages Index Marketplaces, a dedicated platform that enables media planners and buyers to activate their digital media buys across streaming TV, display advertising, video, and mobile app, with greater control, efficiency, and transparency

Through this partnership, DJIB can programmatically trade brand-safe, high-quality media inventory via Index Marketplaces using their preferred demand-side platform (DSP). With direct access to premium inventory, media buyers gain greater control and visibility over ad placements.  

“We are thrilled to announce our partnership with Index Exchange, one of the world’s leading SSPs. Index Marketplaces leverages cutting-edge technology to achieve high efficiency,” said Takahiro Horio, CEO of DJIB. “We are excited to curate Index Exchange’s extensive media inventory and integrate it with our unique solutions, providing marketing opportunities to advertisers across various industries in a brand-safe environment.” 

Activating Index Marketplaces with deal IDs on the supply side facilitates targeted and safe access at scale, resulting in more matchable audiences and greater reach. This approach simplifies access to tailored inventory and enables precise targeting, allowing marketers to execute campaigns with more confidence, drive meaningful results, and achieve successful outcomes. 

This partnership comes as the addressability landscape evolves and media buyers must adapt to the phase-out of third-party cookies. Index Marketplaces assists marketers in strengthening their digital advertising strategies through audience curation, allowing them to reach first and third-party audiences at scale across multiple formats. This enables effective, privacy-focused media strategies for targeted ad placements by seamless audience segmentation. 

“We are very pleased to announce our partnership with DJIB, “said Andrew Casale, president and CEO at Index Exchange. “By leveraging the dentsu group’s assets and our secure, high-quality exchange of omnichannel media companies, Marketplaces creates a bridge between marketers’ needs and efficient media inventory. This collaboration will unlock valuable new business opportunities for marketers and media owners alike.”

*Dentsu Japan International Brands is a brand consisting of Carat Japan, iProspect Japan, dentsu X Japan, and dentsu international Japan office in Japan. 

About Index Exchange

About Index Exchange

Index Exchange is a global advertising supply-side platform enabling media owners to maximize the value of their content on any screen. As a trusted partner and ally, we connect leading experience makers with the world’s largest brands to ensure a quality experience for consumers. 

We’re a proud industry pioneer with over 20 years of experience accelerating the ad technology evolution. With our radically transparent business practices and dedication to total market efficiency, we’re committed to upholding the integrity of the programmatic ecosystem at large. 

Our global teams are dedicated to driving industry standards and building technology that delivers scale, efficiency, and long-term value for our customers and partners. To learn more, visit: or @indexexchange.

About dentsu Japan international brands

About dentsu Japan international brands

Dentsu Japan International Brands (DJIB) in collaboration with dentsu’s global network of over 140 countries and territories around the world, consists of four companies. Carat Japan with its broad spectrum of communication expertise especially within media; iProspect Japan’s integrated digital solutions, specializing in performance and brand marketing; dentsu X Japan and dentsu international Japan office provide a wide range of advertising and marketing services, including integrated media planning and buying. DJIB drive comprehensive business growth by extracting the best of each company, creating new values and opportunities. Teaming with dentsu group’s diverse talent base as well as technology resources creating effective synergies. DJIB’s unique advantage lies in its capability to provide a one-stop solution for integrated marketing services, working to global standards for national and international brands.  

Our seasoned professionals with various expertise in the field of communications, provide best-in-class solutions as one team for our clients, striving to become a trusted business growth partner. Our purpose is to be an unparalleled, one-of-a-kind entity in an ever-changing society.  

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