Hiroshi Igarashi

Executive Senior Advisor 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.

OperatorTokyo, Japan30+ years in industry

Last updated May 31, 2026 by the ATDb Editorial Team

Bio

Hiroshi Igarashi is Executive Senior Advisor at Dentsu Group Inc. He served as the company's President and Global CEO from 2020 until March 2026, when he was succeeded by Takeshi Sano — capping a career of more than 40 years at the Japanese advertising and media holding company.

Previous Roles

President & Global CEO

Dentsu Group (2020–2026)

Expertise

Integrated Marketing ServicesDigital TransformationCustomer Experience Management (CXM)Data-Driven MarketingMarketing TechnologyPerformance MarketingOrganizational TransformationGlobal Advertising Operations

Education

Degree details not publicly confirmed, Keio University (commonly cited but unverified)

Notable Achievements

Led the launch and execution of the 'One Dentsu' strategy, consolidating Dentsu's global operating model to improve client service and operational efficiency
Oversaw Dentsu Group's structural transformation including significant workforce restructuring and investment reallocation toward high-growth digital and technology services
Guided Dentsu through a critical post-pandemic recovery and repositioning period, stabilizing the group's financial performance while accelerating its shift toward customer transformation services

Speaking Topics

The future of integrated marketing servicesDigital transformation in advertising holding companiesCustomer experience management and data-driven marketingOrganizational transformation and the 'One Dentsu' model

Board Memberships

Dentsu Group Inc. (Board of Directors)

Connections