GroupM Japan

Tokyo, Japan · Founded 2003

1001-5000 employees

Sourced & current · updated Jul 21, 2026

GroupM Japan is the leading media investment and management group in Japan, overseeing WPP's portfolio of media agencies including Mindshare, MediaCom, Wavemaker, and EssenceMediacom.

Where they sit

Attribution & AnalyticsMarketing AgencyProgrammatic Platform

Largest media investment group in Japan by billings, part of the globally dominant GroupM network under WPP

Ownership

Parent: WPP Media