KDDI Corp. engages in the telecommunications business. It operates through the following segments: Personal Services, Business Services, and Others. The Personal Services segment provides communication services for individuals and energy; educational services; commerce; finance and settlement; and entertainment services. The Business Services segment provides communication services, ICT solutions, data center services for companies The Others segment handles communication equipment construction and maintenance, and research and development of information and communication technology. The company was founded by Kazuo Inamori on June 1, 1984 and is headquartered in Tokyo, Japan.