apartmentCorporate Profile
About Us
About Us
Corporate Profile
KT Japan
KT Japan is the Japanese subsidiary of KT, Korea's largest telecommunications company. KT, the leading provider of ultra-high-speed communication services and IT solutions in Korea, is expanding globally across five continents with diverse information and communication services. Since its establishment in 1999, KT Japan has been supporting business exchanges between Japan and Korea based on advanced IT technology.
Business Areas
Through KT Japan's six business domains, we provide communication and IT solutions that bridge Japan and Korea.
SoftBank Corp.
Colt Technology Services Co., Ltd.
NTT Communications Corporation
KDDI Corporation
Mitsubishi Electric Information Network Corporation
Nippon Telegraph and Telephone East Corporation
Nippon Telegraph and Telephone West Corporation
SoftBank Corp.
Colt Technology Services Co., Ltd.
NTT Communications Corporation
KDDI Corporation
Mitsubishi Electric Information Network Corporation
Nippon Telegraph and Telephone East Corporation
Nippon Telegraph and Telephone West Corporation
News
View All News2026/6/4Servicettshop Launches K Magazine — Korea Travel, K-POP, Beauty and Morearrow_forward2026/6/2PartnershipStrategic Partnership with MC Digital Realtyarrow_forward2026/4/15ServiceStudying in Korea? Here's why KT's Welcome 5G plan is worth a lookarrow_forward2025/8/7CampaignKT Japan fully supports your Korea trip! Launching 5 exclusive benefits for 'Korea eSIM / SIM Card' purchasersarrow_forward2025/1/16CampaignLaunching discount coupons for Korea travel for Korea eSIM/SIM card customersarrow_forward2024/9/1InfoNotice of Head Office Relocationarrow_forward2018/2/16InfoNotice Regarding Absorption-Type Corporate Splitarrow_forward
Corporate Data
Company Name
KT Japan Co., Ltd.
Established
March 25, 1999
Shareholder
KT 100%
Representative
Representative Director: Park Chanbeom
Capital
83,550,000 JPY
Address
3F Kokuryuu Shiba-koen Bldg. West Wing, 2-6-15 Shiba-koen, Minato-ku, Tokyo 105-0011
TEL / FAX
03-6432-4532 / 03-6432-4536
Business Activities
International leased lines, international IP-VPN, IP-Transit and international data communication services (KT Japan Network)Enterprise cloud connectivity and NaaS solutions (KT Japan x Epsilon)MVNO business (tt mobile)Korea SIM sales business (Korea SIM Business)Consulting on telecommunications and IT solutions (IT Support)IP character business (IP Business)
KT Headquarters Overview
Founded: December 1981
Revenue
26.431 trillion KRW
(FY2024)
Employees
14,419
(2024)
Listed Markets
Korea, New York, London
Access
Access from Nearest Stations
train
Toei Mita Line "Shiba-koen Station"
Exit A3, 1-minute walk
train
Toei Oedo Line / Asakusa Line "Daimon Station"
Exit A3/A6, 5-minute walk
directions_walk
JR Yamanote Line / Keihin-Tohoku Line "Hamamatsucho Station"
South Exit, 8-minute walk