Bridging Japan and Korea,
Through Technology
As the Japanese subsidiary of Korea's No.1 telecommunications company KT, KT Japan supports business between Japan and Korea with services spanning network, communications, IT, and content.
As the Japanese subsidiary of Korea's leading telecom company KT
Fastest Japan-Korea Network
As the Japanese subsidiary of Korea's leading telecom company KT, we provide the fastest network services between Japan and Korea
Partner Network
Delivering solutions through a partner network of dozens of companies, including Japan's major telecommunications carriers
Only Roaming Provider
The only Korean telecommunications carrier that directly provides roaming services in Korea
Power of KT Group
Services built on the infrastructure and technological capabilities of KT, Korea's largest telecommunications provider
Business Areas
KT Japan Network
International leased lines and broadcasting solutions enabling high-speed, stable communication across borders.
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KT Japan X Epsilon
Providing data communication services connecting 167 cities worldwide through a high-capacity, global carrier-grade backbone.
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IT Support
Cost-effective corporate IT infrastructure. Supporting the system foundations of Japan-Korea business.
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tt mobile
Providing MVNO services for Korean residents in Japan and Japanese travelers to Korea.
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Korea SIM Business
Providing unlimited data and Korean phone numbers through Korea SIM cards.
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Developing character licensing and partnerships.
Learn More arrow_forwardUninterrupted Communication Connecting Japan and Korea
Low Latency: 16.5ms
Tokyo to Busan (via KJCN submarine cable)
Route Redundancy
3 cable routes (KJCN, APG, TPE)
High-Bandwidth Communication
Bandwidth: 2Mbps to 100Gbps
KT Japan × Epsilon
Connecting the world with high-capacity global networks
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Business inquiries?
Contact KT Japan
We support your business with services from network, telecom, IT to content. Feel free to reach out.
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