Overview
KDDI Corporation is a Japan-based telecommunications and digital-services company. Its core businesses include mobile and fixed-line communications, alongside services in areas such as finance, energy, IoT, data centers and digital transformation. It serves consumers and businesses in Japan and provides international connectivity and other services through its global operations and network reach.[1][2][3]
KDDI’s Group Mission is to care for employees’ material and emotional well-being, exceed customer expectations and work toward a truly connected society.[4] For the fiscal year ended March 31, 2026, it reported operating revenue of ¥6.072 trillion and had 73,198 employees as of that date.[5][6] The company traces its establishment to 1984; KDDI was formed through a merger in 2000 and adopted its current name in 2001.[7] [1][2][3][4][5][6][7][1][2][3][4][5][6][7]
Products & services
KDDI’s consumer mobile portfolio includes au, UQ mobile and online-only povo. au offers unlimited-data plans and bundled network and value-added services; UQ mobile focuses on simple, affordable plans; and povo offers a partner-enabled service experience. The brands share KDDI’s mobile network. Named network and value-added offerings include au Starlink Direct, au 5G Fast Lane, au Unlimited Data Overseas and Ponta Pass.[8][9]
For business customers, KDDI groups digital and technology offerings under WAKONX, spanning IoT, data centers, Digital BPO, security, facility solutions and new digital-transformation businesses, alongside core telecommunications. Its IoT examples include ConnectIN for connected PCs and connectivity for boats, construction machinery, and gas and water supply. KDDI described its data centers as connectivity-focused, with regional expansion.[10][11] [8][9][10][11]
Geographic presence
KDDI is headquartered in Tokyo, Japan, and its operations are strongly centered on the Japanese market; it reported 73,814,300 au mobile subscriptions as of June 2026.[6][12] Its FY2026 profile lists 73,198 consolidated employees as of March 31, 2026, but does not provide a country-by-country workforce breakdown.[6]
KDDI also has an international presence: its global-locations directory lists overseas locations by region, and a global-capability brochure describes a support network spanning 302 locations in 108 cities worldwide.[13][14] A company presentation cites connectivity and data-center operations in London, Paris, Toronto, and Bangkok.[11] The available disclosures do not provide a country- or region-level revenue breakdown or percentages.[15] [6][12][13][14][11][15][6][12][13][14][15]
Business segments
For the fiscal year ended March 31, 2026, KDDI reported two segments: **Personal Services** and **Business Services**. Personal Services encompasses consumer telecommunications, including mobile and fixed-line services, as well as consumer-facing financial and energy services and related offerings. Segment operating revenue was ¥4,812,737 million, equivalent to approximately 79.3% of consolidated operating revenue of ¥6,071,915 million.[16][17][18]
Business Services provides telecommunications and related services to businesses, alongside growth areas including IoT, data centers, digital BPO, security, facility solutions, and DX businesses. FY2026 segment operating revenue was ¥1,527,914 million, approximately 25.2% of consolidated operating revenue.[10][18] The percentages use consolidated revenue as the denominator, so they do not sum to 100%: reported segment revenues include inter-segment revenue and eliminations.[18] [16][17][10][18]
Company history
KDDI’s corporate roots include Kokusai Denshin Denwa (KDD), established in 1953 for international telecommunications, and Daini-Denden Planning Company, founded in 1984 as a prospective domestic carrier. Following Japan’s opening of telecommunications to competition in 1985, Daini-Denden developed into DDI.[19][20]
On October 1, 2000, DDI, KDD, and mobile operator IDO merged to form the company that became KDDI; it adopted the KDDI Corporation name on April 1, 2001. KDDI launched third-generation mobile services in 2002, and in 2012 introduced au Smart Value, combining mobile and fixed-line services.[19][21][22]
KDDI expanded into IoT by making SORACOM a consolidated subsidiary in 2017, and launched commercial au 5G in 2020. In 2024, it entered a joint-operation arrangement for Lawson with Mitsubishi Corporation; in 2025, it made cybersecurity company LAC a consolidated subsidiary.[23][24][25][26] [19][20][21][22][23][24][25][26][19][20][21][22][23][24][25][26]
Sources
- www.kddi.com[1]
- www.kddi.com[2]
- biz.kddi.com[3]
- www.kddi.com[4]
- newsroom.kddi.com[5]
- www.kddi.com[6]
- www.kddi.com[7]
- KDDI CORP — Presentation (2025 Y)
- www.kddi.com[12]
- biz.kddi.com[13]
- sg.kddi.com[14]
- www.kddi.com[15]
- KDDI CORP — Additional data (2025 Y)[16][17]
- newsroom.kddi.com[18]
- www.kddi.com[19]
- www.kddi.com[20]
- media3.kddi.com[21]
- www.kddi.com[22]
- news.kddi.com[23]
- news.kddi.com[24]
- newsroom.kddi.com[25]
- newsroom.kddi.com[26]
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