Carta Holdings, Inc. engages in the provision of online advertising services in Japan and internationally. The company is involved in the marketing, digital advertisement, social networking, direct to consumer, data, operation support, advertising platform, TV commercial, digital transformation, media and content, venture capital, human resources, and e-commerce businesses. Carta Holdings, Inc. was founded in 1996 and is based in Minato, Japan. The company operates as a subsidiary of Dentsu Group Inc.