KDDI 

KDDI Corporation operates as a leading telecommunications company, serving customers in Japan and across international markets. Its diverse operations are structured into two primary segments: Personal Services and Business Services. The Personal Services division offers a wide array of mobile communication options, including smartphone and traditional mobile phone services, predominantly marketed under its "au" brand. This segment also delivers fixed-line internet solutions, such as "au Hikari," which provides fiber-to-the-home (FTTH), data transmission, voice, and cable television (CATV) services. Furthermore, it supports Mobile Virtual Network Operator (MVNO) offerings. Beyond core connectivity, KDDI extends its personal services to include the "au PAY" gateway for smartphone-centric payments and financial products, the "au HOME" IoT service for monitoring homes and pets with sensors and cameras, "au Denki" for energy conservation, and educational services through the AEON English conversation school. The Business Services segment focuses on corporate clients, providing global data center facilities under its "TELEHOUSE" brand. This division also supplies a variety of integrated solutions for network and cloud infrastructure, along with specialized smartphones and other devices tailored for business applications. Additionally, KDDI is involved in numerous other ventures, such as broadcasting, wireless broadband, and mail-order retail. The company provides IT support, manages call centers, and offers temporary personnel services. It also plays a crucial role in infrastructure, offering design, construction, maintenance, and operational support for communication equipment and submarine cable systems. Founded in 1953, KDDI Corporation is headquartered in Tokyo, Japan.