KDDI 

KDDI Corporation operates as a prominent telecommunications provider, delivering services across Japan and on an international scale. The company's business is divided into two primary divisions: Personal Services and Business Services. The Personal Services segment offers a comprehensive array of mobile communication options, including smartphone and mobile phone services under the "au" brand, alongside MVNO (mobile virtual network operator) services. This segment also provides fixed-line solutions such as au Hikari, covering voice, data transmission, fiber-to-the-home (FTTH), and cable television (CATV). Beyond core telecom, Personal Services extends to smartphone-centric financial and payment services via au PAY, IoT (Internet of Things) solutions like au HOME for pet monitoring, energy conservation through au Denki, and even English language education with AEON. The Business Services segment caters to corporate clients, delivering data center facilities under its TELEHOUSE brand. It also develops various solutions spanning network and cloud services, as well as support for smartphones and other devices. This division's portfolio further includes broadcasting, wireless broadband, mail order, IT support, call center management, and temporary staffing. Additionally, it offers expert services in the design, construction, maintenance, and operational oversight of critical communication infrastructure, including submarine cables. Founded in 1953, the company maintains its headquarters in Tokyo, Japan.