CAGR (Compound Annual Growth Rate) is the value calculated from the growth rate over a specified period of time as the growth rate per year.


CATV (Community Antenna Television or Cable Television) is a service for delivering television programs through coaxial or fiber-optic cables laid by a cable television company. Apart from terrestrial television channels, several pay channels are also available. CATV is used in apartment buildings and as a countermeasure against difficult visibility and audibility. CATV cables are used not only for television broadcasting but also for internet access and telephone services. KDDI provides lines corresponding to NTT subscriber phone lines through partnership with CATV companies (Cable-plus Phone).


ICT stands for Information and Communications Technology. In the past, Information Technology (IT) was the term mainly used, but in today's internet age, ICT has become the more common term due to the creation of added value by connecting not only computer systems but various other systems to the communications network.


IoT (Internet of Things) refers to the network of all kinds of objects with a communication function that send data collected by sensors, use data in the cloud and perform automatic control based on that data.


LTE (Long Term Evolution) is the communications standard that delivered the evolution of third-generation (3G) mobile phones. The communications speed is overwhelmingly faster than previous communications standards, and large amounts of data can be transmitted in a single transfer. It is the appropriate communications standard for today's society with its rapid spread of smartphones.


An MVNO (Mobile Virtual Network Operator) is an operator that provides services via wireless communications infrastructure borrowed from other telecommunications carriers.


Offline refers to the offline side of O2O (Online to Offline). O2O is a marketing term that refers to mechanisms and strategies for sending users to brick-and-mortar stores and encouraging them to make purchases and place orders, based on information available on the internet. For example, discount coupons for use in brick-and-mortar stores are distributed via the internet, like au Smart Pass, and users are encouraged to visit stores by notifying them when they are in the vicinity of the store using smartphone apps and GPS information.


Omni-channel refers to a coordinated marketing and selling approach among sales channels, warehouses and distribution bases, which are the contact points with customers, such as brick-and-mortar stores, warehouses and online shopping sites.
For example, brick-and-mortar stores and online shopping sites have different product line-ups and inventories. In the case of chain stores, there are generally differences between stores too. So even if a customer visits a brick-and-mortar store through online measures, if the product the customer wants is out of stock, the customer may go to a rival store or another online shopping site. Omni-channel is based on consolidation of inventory information and distribution using information and communications technology and establishment of a sales system where customers receive the same service at every store and on every online shopping site. Out-of-stock items can be ordered online on the spot and delivered to the customer's home, and items ordered online can be picked up at brick-and-mortar stores. Providing a consistent service in all sales channels also offers the prospect of enhanced customer satisfaction.


Multi-channel is a broadcasting service provided on multiple dedicated channels (channels that broadcast throughout the day on one theme such as golf, period dramas, stocks, etc.) and broadcast programs. Multi-channel is usually a pay service. Ordinary TV broadcasts largely use different communication lines and equipment.


Tablet refers to a board-shaped pointing device for a PC, or a PC or device with a similar shape. The origin of the word "tablet" is "table" and products called tablets or pen tablets have long been available as PC peripherals. Pictures and drawings can be drawn by touching the stylus to the board-shaped tablet's surface when connected to a PC and moving the coordinates on the display.

Data Center

A data center is a facility where computer equipment and telecommunications equipment are installed. Data center services refer to operation of the facility.
The data center plays the role of the backbone facility of the information and communications network, providing a stable power supply, connecting to wide-area backbone lines and delivering operation and maintenance 24 hours a day, 365 days a year.

Optical fiber

Optical fiber refers to the cables that transmit data by optical signals. The cables are made out of materials such as glass, plastic and fluorine resin, and data are transmitted by using pulsating light. Optical fibers can transmit large amounts of data faster and with less amount of loss than copper wire, and they are immune to electromagnetic interference.
au HIKARI provided by KDDI can achieve transmission speeds of up to 1Gbps (1,000Mbps).


Multi-device refers to shared use of images, videos and other content between multiple devices, or in particular, synchronizing information between multiple devices and choosing the device to use for viewing and/or listening according to the situation.


Multi-use refers to providing internet experiences, such as remote business conferences and schedule management for business users, and games and music for personal users.

Mobile Wi-Fi Router

A router is a device for interconnecting different networks. Routers are mainly sold to provide internet access. A PC, smartphone or tablet can be connected to the internet with a router. In the past, a router could only connect your home PC to a fixed communication line such as optical fiber, but now routers are sold with built-in mobile phone communication functions and can connect multiple devices to the internet simultaneously even outside of the house or office.

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