Hirotake Yajima

D. A. Consortium, Inc. engages in online media transaction related business. It purchases and sells advertising space; and provides diversified advertising service and content marketing. The company was founded on December 2, 1996 and is headquartered in Tokyo, Japan.

SPiRE, Inc. (Japan) engages in mobile advertising, media, and electronic commerce businesses. It operates through the Mobile Advertising and Media segments. The Mobile Advertising segment offers mobile media representative and mobile advertising agency services. The Media segment provides mail and content, marketing promotion, internet research, and smartphone application development services. The company was founded on October 6, 1997 and is headquartered in Tokyo, Japan.

Hakuhodo, Inc. engages in the management and operation of advertising agencies. It provides strategic planning, customer marketing, creatives, corporate communications, and research services. The company was founded by Hironao Seki on October 6, 1895 and is headquartered in Tokyo, Japan.

IREP Co., Ltd. engages in the digital marketing business. Its services include paid listing, search engine marketing (SEM), mobile SEM, web analytics, and internet advertising. The company was founded by Masayuki Takayama in November 1997 and is headquartered in Tokyo, Japan.

Part of Hakuhodo DY Holdings, Inc., Hakuhodo i-studio, Inc. is a Japanese company that focuses on digital creative initiatives. The company is based in Tokyo, Japan. The company's blog, "whale," sends out daily updates and aims to create excitement and surprise for consumers. The company specializes in communication design and strive to solve customers' issues. Consortium, Inc., a subsidiary of Hakuhodo DY Holdings, Inc., from Hakuhodo DY Holdings, Inc. Hakuhodo i-studio was acquired by D. A.