KDD Corporation, also known as KDDI Corporation, is a major telecommunications company based in Japan. Established in 1984, it provides a wide range of services, including mobile and fixed-line communications, internet services, and data centers. KDDI is known for its innovative solutions and has a significant presence in both domestic and international markets. The company operates under the brand name au for its mobile services and has expanded its offerings to include cloud computing and IoT solutions. KDD Corporation plays a crucial role in enhancing connectivity and digital transformation in various sectors, contributing to Japan's technological advancement.