President & CEO at Dentsu Group Inc.
Leading Dentsu Group's 'One Dentsu' organizational transformation, breaking down silos to create an integrated global model that combines creative excellence with data-driven marketing technology and consulting capabilities.
Last updated Feb 27, 2026 by AI Enrichment
Hiroshi Igarashi is best known as the architect of Dentsu Group's 'One Dentsu' transformation strategy, a sweeping initiative to consolidate the holding company's fragmented global operations into a unified, client-centric model that integrates creative, data, and marketing technology capabilities. Since assuming the role of President & CEO in January 2022, he has positioned Dentsu as a customer transformation partner rather than a traditional advertising agency, emphasizing the convergence of consulting, technology, and creative services in an era of accelerating digital disruption. Igarashi's career at Dentsu spans several decades, during which he rose through senior leadership roles including CEO of Dentsu Japan Network, the domestic operating arm of the group. His tenure has been marked by a consistent focus on digital transformation, data-driven marketing, and the integration of technology into core advertising services. He has been a key figure in navigating Dentsu's evolution from a Japan-centric advertising powerhouse into a globally competitive marketing services group following the landmark acquisition of Aegis Group in 2013. Under his leadership, Dentsu has pursued structural simplification, workforce restructuring, and investment in high-growth areas including CXM (Customer Experience Management), performance marketing, and data solutions. Igarashi has also overseen efforts to strengthen Dentsu's position in the rapidly evolving AdTech landscape, leveraging the group's proprietary data assets and technology platforms to compete with both traditional holding company rivals and emerging consultancy-led competitors such as Accenture Song and Publicis Sapient.
Dentsu Japan Network (2019-2021)
Dentsu Inc. (2017-2019)