KT Japan Network Service
Next-Generation Network Infrastructure
We provide a variety of solutions tailored to customer needs, including Japan-Korea international circuits, Japan local services, international broadcasting services, and live streaming services.
Japan-Korea Premium Line
The highest quality Japan-Korea direct dedicated circuits utilizing KT's submarine cables (KJCN, APG, TPE, etc.), optimized for financial institutions and mission-critical data communication.
Low Latency: 16.5ms
Tokyo–Busan (via KJCN submarine cable)
Route Redundancy
• 3 cable routes (KJCN, APG, TPE)
• Selectable based on customer requirements
* Unprotected / Protected services
Wideband Communication
• Bandwidth: 2Mbps–10Gbps
• Options: LANPHY, WANPHY, OTN
* Flexible bandwidth upgrades via software (POTN & PTN)
Submarine Cable Network
Achieving global connectivity through 9 submarine cables connecting Asia-Pacific to North America.
Subsea Cable Capacity & Pricing
Current capacity and monthly recurring charges on our main subsea routes. Updated every two weeks.
Last updated:
| Route | Cable | Demarcation Points | Available B/W (G) | PRICE (MRC) / 100G | RTD (ms) CLS to CLS | RFS |
|---|---|---|---|---|---|---|
| HK-SG | SJC2 | Mega-I ~ SG3 | 300 | mailEmail us | around 38 | |
| HK-SG | SJC1 | Mega-I ~ SG3 | 300 | around 38 | ||
| JP-US | Unity | Chikura CLS ~ Coresite LA1 | 500 | around 95.5 | ||
| SG-KR-US (KR XC only) | APG+NCP | SG3 ~ Busan(XC) ~ US Data Center | 800 | around 180 | ||
| SG-KR-US (KR XC only) | APG+NCP | SG3 ~ Busan(XC) ~ US Data Center | 300 | around 180 | AVAILABLE/READY | |
| HK-KR-US (KR XC only) | APG+NCP | Mega-I ~ Busan(XC) ~ US Data Center | 300 | around 170 | AVAILABLE/READY | |
| HK-KR-US (KR XC only) | RNAL+NCP | Mega-I ~ Busan(XC) ~ US Data Center | 300 | around 170 | AVAILABLE/READY | |
| SG-JP | APG | SG Changi APG CLS ~ JP Shima APG CLS | 400 | around 63 | AVAILABLE/READY | |
| KR-HK | APG | KR Busan CLS ~ HK TKO CLS | 400 | around 35 | AVAILABLE/READY | |
| KR-JP | KJCN | KR Busan CLS ~ JP Kitakyushu CLS | 400 | around 10 | AVAILABLE/READY | |
| KR-SG | APG | KR Busan CLS ~ SG TNM CLS | 1100 | around 56 | AVAILABLE/READY |
Cable Name & Route Details
| Cable Name | Route |
|---|---|
| KJCN | KR — JP |
| SJC2 | HK — SG, SG — JP |
| UNITY | JP — US |
| ADC | SG — JP |
| JUNO | JP — US |
| FASTER | JP — US |
| APG | KR — JP, KR — CN, KR — HK, KR — SG |
| NCP | KR — CN, KR — TW, KR — US, JP — US, CN — JP |
| TPE | KR — JP, KR — CN, KR — TW, KR — US |
Korea Paid Peering Service
We provide a high-quality peering service connecting KT's large-capacity Korean internet backbone with the Japan-Korea fastest network KJCN.
Korea Internet Data Services
We provide optimal data circuit services tailored to your needs, using KT's Korean domestic internet backbone.
Leased Line
Leased Line
A dedicated line service connecting customer premises end-to-end. Using dedicated transmission equipment, we guarantee the highest quality line stability and bandwidth.
- check_circleEnd-to-End Dedicated Circuit
- check_circleHighest Line Stability
- check_circleBandwidth Guaranteed
Internet
DIA
A corporate internet service using KT's enterprise internet backbone 'Kornet.' Supporting bandwidth from 10M to 10G, connecting enterprises via dedicated lines.
- check_circle10M to 10G Support
- check_circleEnterprise Dedicated Line Connection
- check_circleOutstanding Cost Performance
GiGA office
GiGA office
An internet service using corporate cable lines. While applying Kornet's enterprise-grade quality management, we offer cost-effective and reasonable plans.
- check_circleEnterprise Quality Management
- check_circleReasonable Pricing
- check_circleCable Line Connectivity
International Broadcasting Service
We provide high-quality video transmission services using KT's submarine cables and satellites.
Within Korea, leveraging KT's nationwide fiber network, video can be transmitted to Japan from anywhere. In partnership with domestic Japanese partners, our services are used by Japanese broadcasters and various content providers.
Dedicated International Broadcasting
We build a dedicated Japan-Korea broadcasting network to deliver high-quality live video transmission services.
- check_circleStable transmission quality via international leased lines (redundant routes)
- check_circleContent protection through closed network architecture
- check_circleTransmission from various locations/formats (dedicated, satellite, internet)
- check_circleProven track record supporting top K-POP events: MAMA, Golden Disk Award, BTS concerts, and more
- check_circlePermanently connected to major Korean broadcasters
Live Streaming Broadcasting
We build dedicated live streaming lines to deliver high-quality live video transmission services.
- check_circleTransmission via dedicated or multiple lines
- check_circleAvailable at concert venues nationwide
- check_circleProven track record including HYBE-hosted concerts and many other events
- check_circleFrom site survey to line removal, KT Japan provides end-to-end support
Get a custom network assessment
Contact our technical sales team for custom infrastructure assessments and dedicated line quotes.
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