|Keidīdīai kabushiki gaisha|
| TYO: 9433 |
TOPIX Core 30 Component
|Founded||1953(establishment of Kokusai Denshin Denwa or KDD as a state-owned enterprise)|
|Founder|| Government of Japan (for the KDD branch)|
Kazuo Inamori (for the DDI branch)
|Headquarters||Chiyoda, Tokyo, Japan|
|Takashi Tanaka, CEO|
|Products||Fixed line and mobile telephony, Internet services, digital television|
|Revenue||JP¥ 5.24 trillion (2020)|
|JP¥ 639.77 billion (2020)|
|Owners|| Kyocera (12.76%)|
Number of employees
|Subsidiaries||KDDI R&D Labs|
KDDI Network & Solutions
Kokusai Cable Ship
Okinawa Cellular Telephone
KDDI Corporation (KDDI株式会社, KDDI Kabushiki Gaisha) (TYO : 9433) is a Japanese telecommunications operator formed on October 1, 2000 through the merger of DDI Corp. (Daini-Denden Inc.), KDD (Kokusai Denshin Denwa) Corp. (itself a former listed state-owned enterprise privatized in 1998), and IDO Corp. It has its headquarters in the Garden Air Tower in Iidabashi, Chiyoda, Tokyo.
KDDI provides mobile cellular services using the "au by KDDI" brand. ISP network services are provided under the au one net brand, while "au Hikari" is the name under which long-distance and international voice and data communications services and Fiber to the Home (FTTH) services are marketed. ADSL broadband services carry the brand name "ADSL One", and IP telephony over copper is branded as "Metal Plus".
On April 1, 2002, au by KDDI launched 3G networks using CDMA2000 1x technology.
On November 28, 2003, au by KDDI launched EV-DO Rev 0 service in the "CDMA 1X WIN" brand, and revolutionized Japan's mobile telecommunication industry by introducing fixed rate data subscription plans at a data rate of 2.4 Mbit/s.
In December 2006, au by KDDI became the first carrier to provide an EV-DO Rev A service at a data rate of 3.1Mbit/s (downlink), 1.8Mbit/s (uplink).
au by KDDI has been very successful with its EZ wireless data services, EZweb, EZweb@mail, EZappli, EZchakuuta, ezmovie, and EZnaviwalk (GPS), using the advanced WAP technology. It supports both Java ME and BREW application environments.
In November 2004 au by KDDI introduced the music include ringtone download service Chaku Uta Full (music ringtone full), for download of full length songs to mobile phones. Within six months from introduction, on June 15, 2005, customers had downloaded 10 million full length Chaku Uta Full songs.
As of end of June 2005, au by KDDI has 20,122,700 customers, among which 18,723,200 (93%) are 3G CDMA2000 subscribers. It is Japan's second-largest cellular operator with an increasing 20.0% market share.
On January 26, 2006, the first pointing local search application, Mapion Local Search - Powered by GeoVector, was launched on the KDDI network on their GPS and compass equipped handsets.In January 2007, KDDI announced its ten new 3G models for spring 2007, and a concept of its new designer phone Media Skin by Tokujin Yoshioka which would later be displayed at the Museum of Modern Art in New York with the Infobar, Talby and Neon models. Toshiba, Casio, Sanyo, Kyocera, Hitachi, Sony Ericsson, Sharp, and Panasonic have manufactured the other models. In March 2007, Media Skin started selling.
KDDI announced that it would collaborate with the Taiwanese manufacturer HTC Corp. to sell the mobile phone HTC J in Japan starting May 2012. The HTC J mobile phone featured the Android 4.0 operating system.
On October 21, 2011 KDDI buys Content Delivery Network CDNetworks For $167 Million.
KDDI together with Sumitomo Group signed an agreement with Myanmar State owned Myanmar Post and Telecommunication (MPT) in July 2014 to jointly operate a mobile phone service in Myanmar for next 10 years.
Consumer showroom is set in Harajuku called, "KDDI Designing Studio".
TU-KA (TU-KA by KDDI), a subsidiary company of KDDI, was a 2G PDC cellular operator in three metropolitan areas (Tokyo, Nagoya, and Osaka), which did not apply a 3G license. TU-KA was best known for having singer Ayumi Hamasaki to appear in their commercials. TU-KA was closed on March 31, 2008.
DDI Pocket, a PHS operator, was previously owned by KDDI but has now been spun off as Willcom.
In August 2014, KDDI announced it was joining forces with five other global companies, including Google to build a 60Tbit/s undersea data transmission cable linking the United States West Coast and Japan.The cable started operation in June 2016.
KDDI and Ericsson began working together in December 2015 in order to research and develop 5G technology.
In 2003, several class action complaints were filed against DDI for misrepresenting and/or failing to disclose material facts about the Company's financial results.The parties agreed on a $4.4 million settlement in 2006.
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP, UMTS is a component of the International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology. UMTS uses wideband code-division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators.
3G is the third generation of wireless mobile telecommunications technology. It is the upgrade for 2.5G GPRS and 2.75G EDGE networks, for faster data transfer. This is based on a set of standards used for mobile devices and mobile telecommunications use services and networks that comply with the International Mobile Telecommunications-2000 (IMT-2000) specifications by the International Telecommunication Union. 3G finds application in wireless voice telephony, mobile Internet access, fixed wireless Internet access, video calls and mobile TV.
NTT DoCoMo's i-mode is a mobile internet service popular in Japan. Unlike Wireless Application Protocol, i-mode encompasses a wider variety of internet standards, including web access, e-mail, and the packet-switched network that delivers the data. i-mode users have access to various services such as e-mail, sports results, weather forecast, games, financial services, and ticket booking. Content is provided by specialized services, typically from the mobile carrier, which allows them to have tighter control over billing.
SoftBank Group Corp. is a Japanese multinational conglomerate holding company headquartered in Minato, Tokyo. SoftBank owns stakes in many technology, energy, and financial companies. It also runs Vision Fund, the world's largest technology-focused venture capital fund, with over $100 billion in capital.
NTT Docomo Inc. is the predominant mobile phone operator in Japan. The name is officially an abbreviation of the phrase, "do communications over the mobile network", and is also from a compound word dokomo, meaning "everywhere" in Japanese. Docomo provides phone, video phone, i-mode (internet), and mail services. The company's headquarters are in the Sanno Park Tower, Nagatachō, Chiyoda, Tokyo.
SK Telecom Co., Ltd. is a South Korean wireless telecommunications operator; it is part of the SK Group, one of the country's largest chaebols.
4G is the fourth generation of broadband cellular network technology, succeeding 3G, and preceding 5G. A 4G system must provide capabilities defined by ITU in IMT Advanced. Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, and 3D television.
Personal Digital Cellular (PDC) was a 2G mobile telecommunications standard used exclusively in Japan.
WiBro is a wireless broadband Internet technology developed by the South Korean telecoms industry. WiBro is the South Korean service name for IEEE 802.16e international standard. By the end of 2012, the Korean Communications Commission intends to increase WiBro broadband connection speeds to 10Mbit/s, around ten times the 2009 speed, which will complement their 1Gbit/s fibre-optic network. The WiBro networks were shut down at the end of 2018.
au, or au by KDDI, is a brand marketed by KDDI in the main islands of Japan and by Okinawa Cellular in Okinawa for their mobile cellular services.
LISMO is an online music service provided by au, a Japanese mobile phone brand run by KDDI, a Japanese telecommunication company. This service uses a mobile phone as a music player. This service was introduced on January 19, 2006, and the service began operating at the end of January in Japan. The first mobile phone which supports LISMO was sold on January 26, 2006. Since 2008, KDDI and Okinawa Cellular introduced 'LISMO Video', a new service with new means to enjoy video content as well.
Mobile broadband is the marketing term for wireless Internet access through a portable modem, USB wireless modem, or a tablet/smartphone or other mobile device. The first wireless Internet access became available in 1991 as part of the second generation (2G) of mobile phone technology. Higher speeds became available in 2001 and 2006 as part of the third (3G) and fourth (4G) generations. In 2011, 90% of the world's population lived in areas with 2G coverage, while 45% lived in areas with 2G and 3G coverage. Mobile broadband uses the spectrum of 225 MHz to 3700 MHz.
Ymobile Corporation (ワイモバイル株式会社), stylized Y!mobile, is a subsidiary of Japanese telecommunications company SoftBank Group Corporation that provides mobile telecommunications and ADSL services. The current CEO of the company is Ken Miyauchi. It was formed in 2014 through the merger of Willcom and eAccess, and uses the Y! moniker brand from Yahoo! Japan, which is partly-owned by SoftBank.
In telecommunications, Long-Term Evolution (LTE) is a standard for wireless broadband communication for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA technologies. It increases the capacity and speed using a different radio interface together with core network improvements. LTE is the upgrade path for carriers with both GSM/UMTS networks and CDMA2000 networks. The different LTE frequencies and bands used in different countries mean that only multi-band phones are able to use LTE in all countries where it is supported.
G-Book is a telematics subscription service provided by Toyota Motor Corporation in Japan for its Toyota- and Lexus-branded vehicles. G-Book allows users to link with cellphones. personal digital assistants (PDA)'s, personal computers (PC) and G-Book equipped cars across Japan. It is based on the former GAZOO infrastructure of Toyota's membership-based information service and membership system, and it provides interactive information services via vehicle installed touch-screen wireless communication terminals. It also incorporates information from Toyota Mapmaster Inc. which updates digital mapping information and is used by various international companies.
The Japanese mobile phone industry is one of the most advanced in the world. As of July 31, 2013 there were 139,180,300 mobile phones in use in Japan. This is 110 percent of Japan's total population according to the Ministry of Internal Affairs and Communications.
The mobile phone industry in the United States is covered in this article. Mobile phones are commonly referred to as smartphones or cell phones.
Myanma Posts and Telecommunications, abbreviated MPT) is a state owned enterprise in Myanmar under the supervision of Ministry of Transport and Communications. MPT operates the country's postal system. The Myanmar Postal Service now runs 1294 post offices throughout the country. Local Express Myanmar Postal Parcel Service was introduced in Yangon and Mandalay on 1 April 1992 and its services are now extended to 129 townships. Until 2013, MPT was also Myanmar's only telecommunications operator.
The Sony Ericsson Xperia acro is an Android-based smartphone produced by Sony Ericsson Mobile Communications in Japan. The device has several additional functions for Japan customers from Xperia Arc. It was launched on 24 June 2011.
3G mobile telephony was relatively slow to be adopted globally. In some instances, 3G networks do not use the same radio frequencies as 2G so mobile operators must build entirely new networks and license entirely new frequencies, especially so to achieve high data transmission rates. Other delays were due to the expenses of upgrading transmission hardware, especially for UMTS, whose deployment required the replacement of most broadcast towers. Due to these issues and difficulties with deployment, many carriers were not able to or delayed acquisition of these updated capabilities.