Safer and More Resilient Connected World

Our mission as a telecommunications operator is to ensure a communications environment where customers can use mobile phones and smartphones easily anytime anywhere. KDDI will offer safe and secure communications services by engaging sincerely in every operation from quality management and improvement of communications infrastructure, such as mobile phone base stations and switching equipment for fixed-line phones, to building next-generation networks.

KDDI owns a number of telecommunications facilities, including optical cables and mobile phone base stations, which it maintains and operates via technical centers located throughout Japan.
Two operation centers located in Tokyo and Osaka conduct centralized monitoring of network conditions nationwide 24 hours a day, 365 days a year. In the event of a failure, these centers manage communications, working with maintenance departments throughout Japan. To ensure high-quality and reliable network service, we build, analyze and improve our facility operating system in line with our stringent standards.
Aiming for zero serious accidents, we at KDDI hold 20,000 training sessions each year. Our work procedures are based on the ideas of capacity design of telecommunications equipment, functional redundancy, distributed arrangement of facilities and functional safety.

Our mission is to offer a stable call and data transmission environment around the clock with a motto of "connecting and protecting lives, connecting day-to-day lives, and connecting hearts and minds." We will aim to build a 5G telecommunications network together with au 4G LTE communications network (800 MHz platinum band, etc.) across Japan to provide a more comfortable telecommunications environment. The 5G service, which provides an advanced telecommunications environment of low latency and high capacity, is much anticipated by many of our customers.
We plan to roll it out in regions as well as major cities.
In addition, KDDI is working to introduce Japan's first "Starlink" satellite telecommunication service using non-geostationary satellite provided by SpaceX. This will use high-speed, high-volume telecommunication as backhaul lines at au base stations to realize high-speed Internet communication using au mobile phones in mountainous areas and isolated islands.
We will also strive to offer au mobile phone and smartphone users a reliable communications environment in crowded areas as well as airports, commercial facilities, event halls, and other in-house spaces.

To offer a reliable communications environment to au mobile phone and smartphone users, KDDI sets up mobile phone base stations in all parts of Japan to support new services and improve service area quality for our customers' safe and comfortable life. When designing and building a new, safe and reliable base station, we observe the Radio Law, Building Standards Act and other relevant laws and regulations as well as municipal ordinances and guidelines. The installation work is carried out by an experienced, designated construction company under a thorough safety management scheme. In cases where the construction is expected to cause a nuisance or inconvenience to the residents in the neighborhood due to an increase in construction vehicle traffic and noise, or if we receive inquiries about the base station, we share general information about the base station and explain about the construction work to ensure their understanding and cooperation.

As part of detailed quality improvement efforts for each customer, we offer Signal Support 24, an after-sales support service concerning signal-related problems, for all customers using au mobile phones.
In this service, KDDI staff visit the homes of customers who have inquired about signal quality and examine the reception conditions for au mobile phones. We contact the customers to set up an appointment within 24 hours of their inquiry, and then visit to check the signal and improve the signal quality using au Femtocells or au repeaters. We accept inquiries about signal quality not only in homes but also outdoors and in offices and restaurants.
In fiscal 2021, in response to the COVID-19 pandemic and to reduce the burden on customers, we introduced the use of equipment delivery depending on usage conditions. By visiting or delivering equipment, we proposed approximately 21,000 measures to improve signal qualities based on them.
Going forward, we will strive to further improve customer satisfaction with our services so that customers think "I'm glad that I chose au," and expand our service coverage.
Signal Support 24 is available also to customers using UQ mobile and povo.

The mobile network that supports communication on smartphones and mobile phones has evolved from the first generation (1G) to the fourth generation (4G) together with changes in the times and lifestyle. We conducted research and development of the next-generation mobile communication system "5G" with an aim to provide communications services with greater stability and higher speed to customers and promote dramatic development of ICT network infrastructure, and on March 26, 2020, we launched the "au 5G" service. 5G networks are capable of higher speed and capacity, low latency and many simultaneous connections. By connecting everything via networks, beginning with smartphones and mobile phones, we will continue helping to build Society 5.0 (a creation-based society) as we create new services and solve social problems.
The COVID-19 pandemic has created the need for the "new normal" in every aspect of industry and people's everyday life. To create resilient social infrastructure designed to help prevent any further spread of infections while supporting economic growth, digital transformation (DX) should be accelerated. With the concept "5G for everyone," we will be working with our partners in various industries to offer individual customers new ways of enjoying entertainment, sports, and art, among others, that suit the new normal, thereby making 5G available to as many people as possible. With regard to corporate customers, companies in various industries have increasingly adopted DX for different purposes of use, dramatically transforming their business models. We have the KDDI Digital Gate, which serves as a business development center in the age of 5G and IoT designed to assist customers with DX, along with the KDDI research atelier, which serves as a survey and applied research center that proposes a new lifestyle toward 2030. At these centers, we plan to work with our various partners to create business as well as the new customer experience unique to the age of 5G, and to help build robust and resilient infrastructure that is highly adaptable to change of environment.

With the evolution of devices and the proliferation of IoTs, mobile networks are required to perform at much higher levels than expected before. KDDI will work on demonstration experiments with its partner companies to pursue business opportunities beyond industrial borders and fields of business through the fifth-generation mobile communications system "5G" with high speed, high capacity, low latency, and massive device connectivity.
We will actively roll out 5G services as basic next-generation infrastructure, develop businesses through co-creation with various partner companies, and promote open innovation that incorporates the innovative ideas and advanced technologies of start-ups. In this way, we will create new customer experience and actively utilize 5G services for regional revitalization businesses.
In September 2021, we began 5G (5G SA) communications tests in a standalone architecture in a commercial environment to provide services that take full advantage of the features of 5G.
In the future, the introduction of 5G SA will enable the use of network slicing and Multi access Edge Computing (MEC) that provides not only high-speed, high-capacity communications but also communication functions tailored to the applications and needs of each broad range of uses from entertainment to business domains, including XR applications, factory automation to collect sensor information and remote operations in the manufacturing industry, and autonomous driving and driving control in the traffic field.
In February 2022, we began offering 5G SA to corporate customers, and we will further develop our network slices for full-scale deployments, while contributing to the development of business with our customers.

The users of au smartphones and mobile phones can enjoy our voice and data communications services in 150 or more countries and regions around the world, including the World Data Flat service, which provides a data service at a flat rate. This is realized based on the partnerships with overseas telecommunications operators that we have cultivated in the course of providing international telephone services for more than 65 years.
Starting from February 2020, an early booking discount is applicable to the World Data Flat service when the service is booked in Japan before departure. No prior settings are required when using the service overseas.
KDDI will strive to continue to provide an environment where users can use our communications services securely and comfortably outside Japan.